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Canada

(18,306 posts)

8. I'm sure there's a geologic explanation, but those walls look quite flat and evenly-spaced.

Sun Dec 3, 2017, 02:48 AM

Dec 2017

It looks carved-out to me.

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Highlight:

This is a major discovery': Explorers find massive ice-age cavern beneath Montreal [View all] applegrove Dec 2017 OP

Wow shenmue Dec 2017 #1

Sacre bleu! Sneederbunk Dec 2017 #2

ohm myyyyyy!! AllaN01Bear Dec 2017 #3

Can we move in? nt Laffy Kat Dec 2017 #5

Darn. OK. nt Laffy Kat Dec 2017 #7

Mammoth Cave is a lot like that ... eppur_se_muova Dec 2017 #9