During a recent camping trip along the Rideau Waterway I went for a brief hike into the woods near our campsite at Davis Locks and stumbled upon an interesting geological formation. This extensive outcropping of unusual rocks on Lake Opinicon had me take a closer look which led me to a rugged cliff like area. A collection of strewn stones and odd formations were visible that looked curiously man made. Of course wanting to investigate further, I climbed these rocks for about 20 minutes to the summit where tucked beneath a stand of trees I came across an unusual stone cairn. It’s purpose unknown, the structure was compiled of rocks piled into a rectangular formation with purposely placed stone steps leading into it. The stones of the structure were placed atop an existing boulder protruding from the ground, as well as a split rock also situated in the ground. It looked like a kid’s fort built on the top of a cliff. Yet it seems like a lot of effort the kids went to in building the structure, but perhaps kids years ago were more resourceful than kids today. I inspected the structure for other details that may reveal its purpose, but still the answer was not clear. I photographed it and proceeded to descend the cliff back to camp. Eventually I wanted to ask others what they thought it was to see if we could solve the MYSTERY OF THE STONE CAIRN.
Returning to Ottawa I emailed some photos of the mystery structure to experts in the field of archaeology to see if they could give their opinion as to what it was. A response soon came back that it was some sort of old mining operation structure, a flagpole base or a lime kiln. I personally don’t think it could be a mining operation since I have come across these before and there is no indication the area had any active mining. With the canal lock in close proximity a flag pole base could be an option, but the size of the structure measured about 8 feet by 6 feet and about 4 feet tall, which makes it seem like an unusual candidate for a flag pole base. A kiln is a possibility, but it seemed so crudely put together that it seems unlikely it would be used for heating/kiln purposes.
Doing my own research into what it could be, a looked into the previous history of the land where it rests. Research shows the parcel of land was first owned in 1797 by a Loyalist by the name of Walter Davis from Connecticut , of which the lock is named after. A former member of the American Rangers, Davis moved to South Crosby Township where he set up new life for himself as a Loyalist, building a home and mill on the site of rapids that once connected Lake Opinicon to Indian Lake. This would later be taken over by Col.John By during the construction of the canal system in 1826 when the locks were constructed and the rapids diverted and channelled elsewhere.

The structure measures about 6 by 8 feet and is about 4 feet tall. The interior is filled with unknown material.
Did Davis build a stone lookout atop the cliff overlooking his property? The structure is situated on the highest point of land that overlooks both lakes and commands an impressive view where you would be able to see anyone approaching for miles. As a former American Ranger, perhaps Davis knew to take the strategic high ground to build a mini stone fort lookout. However, why was this not destroyed in the almost 200 years it could have been sitting there by the various other people that came into the area?

A map from 1880 shows the area and a “Store Ho.” is marked in the vicinity. Is this the storehouse made of stones?
I contacted another source who may have answers, a historian who specializes in the history of the Rideau canal. Upon receiving the photos of the structure he was also mystified as to its purpose and given the GPS coordinates, went to investigate for himself and inspect it for clues that may reveal its purpose. Upon closer inspection he concluded it is just a “children’s fort” and which could date it to almost any period (1800s or even early 20th century).
This conclusion is in part because he could not can’t see any other purpose for it. He quotes from his investigation it is “Sloppily built (so not an official structure) and uses local field stones. The few squared stones actually appear natural or minimally worked (I can’t see any obvious tool marks) and they clearly form steps into the structure.” However, he still thinks it is open to other theories and says his analysis is “just a guess on my part, I’m not an expert, so still open for interpretation. However I don’t see it as anything Walter Davis Jr. would have done, there’s no reason for it.”
Looking further into the land owner Walter Davis who is from Connecticut, I attempted to see if there was a connection to the state he came from. Perhaps there was a typical North Eastern United States stone building technique that was common to that area Davis brought with him to Canada. A quick Google search revealed that Connecticut, New Hampshire and Vermont all have an incredibly high number of these mystery stone cairns as well. Is there a connection to some kind of Eastern US farming practice? Maybe they used these stone cairns to burn brush or store garbage.
Another theory put forward by a historian is that these mystery stone cairns are based on aboriginal spiritual practices built by the indigenous people of the area. “Stone Structures of the NorthEastern United States” is a website dedicated to the study of these mystery stone structures found in the woods and forest regions of the NorthEastern United States. They refer to these structures as a “cairns” which are “an intentionally constructed pile of stones. It is built one stone at a time. Cairns have been used by humans in the northeastern United States as far back in time as 5,000 years ago and continue to be used today. Cairns were built by both Native American Indians and white settlers. They were used by the Native Americans for ceremonial purposes and by white settlers for utilitarian purposes.”

Another North Eastern United States Stone Cairn structure that is similar. (photo:StoneSturctures.org)
Comparisons of the Opinicon stone structure and the ones presented at Stone Structures.org are almost identical. They give an example of a cairn that uses a “base stone” the same as the Opinicon cairn. The base stone cairn is built upon an above ground boulder, below ground boulder with exposed top, above ground bedrock called an outcrop, or surface level exposed bedrock. Base stone ranges from ground level up to three to four feet high.” The use of a split stone in the base, also like the Opinicon Cairn “exhibits a total split or crack in the base stone. Split stone cairn sites are said to be a spirit portal to the Underworld, utilized by Native Peoples during a “Spirit Quest”. In his book “Vision Quest” author Steven Foster recounts how the piling of stones to form a structure is an ancient practice of “communication” between the living and the dead, where you would enter the structure and connect with loved ones passed and the spirits of nature. Foster says they are usually constructed at a “beautiful. prominent place, where it could be found easily.”
So, there you have it. A mysterious stone structure sitting in the woods south of Ottawa overlooking Lake Opinicon. To conclude, here is what was said it could be:
-a flag pole base
-a lime kiln
-a mining structure
-a kids fort
-an aboriginal spirit cairn
My thoughts lean towards it being some kind of lookout post our Loyalist friend Davis built when he arrived from Connecticut to the area in 1799. Yet the location is most serene, surrounded by rocks of unusual shapes and geological compounds. Situated high above two gorgeous lakes at rapids that once connected the two in a tranquil forest also lends itself to the plausible theory it was an ancient spiritual structure that has remained as such to this day.
If anyone else has other ideas or theories, please pass them on and perhaps we may eventually solve the MYSTERY OF THE STONE CAIRN.
UPDATE!
Since this post was published it was brought to my attention that the stone structure is actually a British Ordinance watchtower post from the 1800s. If this is the correct answer, then the structure I think should be studied in further detail and an archaeological analysis and/or preservation of the site should be undertaken to preserve this unique piece of early Rideau Canal history. The answer submitted is copied and pasted below:
“If you were camped at Davis and went up the trail to the high ground on the opposite side from the lock office there was a British ordinance watch tower that looked off across to Opinicon lake and this is what remains of the base .Cliffe Pennock the turn of the19 century Opinicon barber/photographer took different shots of the lake from this vantage point and they ended up with other Post card publishers of the day like Valentines of Montreal.”
SOURCES
http://www.uelac.org/Loyalist-Info/detail.php?letter=d&line=60
http://www.nativestones.com/cairns.htm
http://digital.library.mcgill.ca/countyatlas/searchmapframes.php
I doubt very much the kid fort option, just figure how much time it would have taken to build something like that just for fun.
Any chance they were used for storing food in? Sometimes in the cooler months hunters would cache say a deer for later retrieval and cover it with rocks to keep animals away from it. Aboriginals and colonists did this.
Hi Andrew! I shared this over on our local face group page to see if anyone knew the origins of the stones, and here’s what came back:
From John Watt
“Well Fiona McKean my handy work finally caught someones attention HAHA just kidding . If you were camped at Davis and went up the trail to the high ground on the opposite side from the lock office there was a British ordinance watch tower that looked off across to Opinicon lake and this is what remains of the base .Cliffe Pennock the turn of the19 century Opinicon barber/photographer took different shots of the lake from this vantage point and they ended up with other Post card publishers of the day like Valentines of Montreal.In those days Postcards where big buisness it was the texting of the era LOL. If you look directly down to the left you will see the old Twin Oaks house many old timers call Boyde farm which was built by a retiring lock master related to the Pinseault and Goulahs of Chafey’s fame if you were at the location I am speaking of .Some time we will have to get together and I will show you the 1200 vintage Postcards I have of the Rideau some enlargements may be suitable for a Chaffey’s pub I keep hearing is coming .It does seam like some of the local kids have added to it since last time i was there . If you look hard you will find the remnants of the foundations of two old canal houses as well as two old Barn foundations depending how hard and you look and how deep into the woods you go.”
This absolutely fascinating to hear…thank you for the response and possible answer to the puzzling stone cairn…It makes sense to me and is a logical spot for such a thing. I will add this to the post!
It would be nice to have some of those postcards you speak of displayed at the public library (Elgin). Would love to see them.
Me too! Please post these postcards when available.
Another great story. Thanks!
There is another mysterious stone structure on opinicon road near Betty franklins home. Same side of road, perhaps 400’feet west of her driveway. About 250 feet into the woods. Has an old coal range ( white porcelain box) in front of it.
I will have to investigate that..thanks for reading and your comments!
This fascinating structure has always been known as ‘The Citadel” in our family & was there when the old cottage across the way was bought about 1896. As children, we all played around it, digging for arrowheads etc. We understood that it had been an old “Indian lookout” & was to have been a good vantage point for the military upon completion of the canal.
Wow! VEry fascinating! So this means the structure has been intact since at least 1896?! WAs it known as an Indian Lookout or a British military installation…thanks for your comments…interesting to hear about it from different sources…
I must have had a senior moment. I meant to say that we called it “The Pinnacle”, not “The Citadel”. We understood that it was built by the natives who used these waters prior to the building of the canal. At that time there was a clear line of sight from there up through the gap towards Chaffeys so they could see any enemies approaching. Family lore has it that the British soldiers used it as a lookout while building the canal. An aftermath of the War of 1812 I guess.
I very much enjoy these entries; I have to refrain from scrolling right away down to the conclusion.
If there are a few of these cairns in the same area then they are most likely aboriginal graves. On my property in Prince Edward County there are at least 8 of these in close proximity to each other. They are various sizes and in different conditions of natural degradation. All the stones were carefully place to form the structure, some in a circular arrangement with a flat top. The stones are now covered in a thick layer of moss. The site on a plateau halfway up an escarpment providing what would have been a beautiful view of the county looking north, but since then the view is blocked by old growth cedar trees. This spring I will be reaching out to a local aboriginal historian for an more informed opinion. It’s quite intriguing to say the least!