Explorers find extraordinary, huge ice age cavern underneath city of Montreal
Complete with a lake
December 02, 2017, Source -- http://skyvalleychronicle.com/...ith-a-lake-i-3042378

(MONTREAL) -- It is by all accounts a stunning discovery. Two cavers have found a huge cavern, formed more than 15,000 years ago during the ice age, beneath the city of Montreal, Canada.

Within the cavern is a lake and until just a few months ago, no modern human had ever been inside the cavern or navigated the lake in an inflatable boat.

Canadian Broadcasting Company (CBC) TV crews were among the first people to go down and document with video what's there.

The news agency reports that the chamber is so deep into the earth that it reaches the Montreal water aquifer. The cavers had to wade through it before using an inflatable canoe to navigate the five-meter-deep water.

The two men who made the discovery still don't know where it ends yet but it is believed to be connected to another well known and deep ice age cavern, the Saint-Leonard Cavern which lies underneath the city of Parc Pie XII, not far from Highway 40.

The CBC says the main portion of the Saint-Leonard Cavern has been open to members of the public for decades, "but tour guides had no idea there had been a massive section hidden behind a limestone wall."

That section behind the limestone wall is the recently discovered ancient cavern that runs at least 200 meters long, six meters high, and about three meters wide.

The CBC has photos and a video of the new discovery here

The cave is so far down that it reaches the aquifer. The explorers had to use an inflatable canoe to navigate part of the cavern, containing water five metres deep. (Submitted by Société québécoise de spéléologie)

Cavers Luc Le Blanc and his friend Daniel Caron couldn’t believe their eyes when they knocked through limestone and discovered this massive chamber beneath Montreal. (Submitted by Société québécoise de spéléologie)

Luc Le Blanc and Daniel Caron, pictured outside the cave, have been exploring underground as a hobby for years. (CBC)

Crawling through this narrow hole leads you to the ceiling of a massive chamber, which you then access by climbing down a ladder. (CBC)

Text of the article -- http://www.cbc.ca/news/canada/...nd-passage-1.4428833