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Ancient Cave Discovered by Amateurs under Montreal

Quebec Speleological Society/Luc Le Blanc

Some of the most incredible wonders of the natural world are those that have remained hidden from human discovery. As it has always been however, human curiosity drives the uncovering of these last few spots of untouched natural wonder.

Luc Le Blanc and Daniel Caron, two amateur spelunkers, discovered a cavern offshoot under Montreal City in October 2017.

Capital Gems, a Canadian website that lists natural sights in the country, states that this cave below the Pius XII Park in the Saint-Leonard borough in Montreal has been well documented since its discovery in 1812. Known as Saint-Leonard Cavern, this cave was declared a historic landmark in 1988 and tours have taken place there for approximately three decades. The original cavern itself is relatively small, only 35 meters long and 8 meters in depth. We now know that the cavern is much larger after this most recent discovery.

Luc Le Blanc and Daniel Caron are part of the Quebec Speleological Society. The Quebec Speleological Society is a private, non-profit organization founded in 1970 to bring together all amateur and professional speleologists in the Quebec area, as stated on their webpage. According to National Geographic, the two have been conducting tests in the cavern for other areas not yet found since 2014. It wasn’t until this year that the explorers were successful.

Quebec Speleological Society/Luc Le Blanc


This new piece is significantly larger than the original cavern, measuring in at over 200 meters long and 6 meters in depth. In parts of the cave, there are over five meters of water which was only accessible by inflatable canoe. It is believed that these caves were formed due to downward pressure on the ground by icebergs, which caused cracking during the last ice age over 10,000 years ago.

This discovery is a huge success within the local area of Montreal. Both Le Blanc and Caron are very proud of their find. City officials are hoping to open this new section up to the public for tours after it has been properly investigated.

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