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An ice cave or englacial melt channel. This ice cave was formed by meltwater flowing within the glacier ice. Belcher Glacier, Devon Island, Nunavut, Canada.

MNN - Mother Nature Networkfrom MNN - Mother Nature Network

9 jaw-dropping caves

Blue Grotto off the coast of the Isle of Capri, Italy. #ridecolorfully

The Huffington Postfrom The Huffington Post

Let's Glow!

Definitely putting this on my places to go in Newzealand glowing worm caves!

PetaPixelfrom PetaPixel

Photographing the Jaw-Dropping 'Crystal Caves' of Iceland

Crystal Cave river exit :: Vatnajokull National Park on the East coast of Iceland

The Crazy Touristfrom The Crazy Tourist

Awesome sights in Europe

The ice canyons in Greenland were carved by meltwater and are as deep as 150 feet.

99TravelTipsfrom 99TravelTips

Five Great Package Holidays that Won’t Break the Bank

Secluded cave near Lagoa, Algarve, Portugal [Portugal is has it all. great food and wine, sights, natural spots (like this one), friendly people... and you can get away with your high school Spanish if you need to. jh]

One of the most incredible Italian churches, the oratory of Santa Maria della Pietà at Rocca Calascio, in Abruzzo, Italy.

Foursquarefrom Foursquare

Jacob's Well

Jacob's Well, just outside of Austin. It is one of the longest underwater caves in Texas and an artesian spring.

Mail Onlinefrom Mail Online

Into the depths of the earth: Cave network in the heart of Vietnamese jungle is so large its end is yet to be found

This recently discovered cave in Vietnam is massive beyond description. An entire forest is growing inside! There are no words to describe the enormity, and beauty of this natural wonder. The Empire State Building will fit inside!