Ecosystems

400 million-year old limestone caverns nestled in the Ozarks served as shelter and a hideout for cultures throughout North American history.

A breathtaking canyon offers stunning views and frightful pathways through an ecological paradise.

Numerous sculptures set along hiking trails symbolize and idealize the relationship between man and nature.

A fiery-red region of scooped out land still largely untouched by civilization, tourists or otherwise.

The subtle interplay of fire and water is hard to ignore at this remote Jamaican spring.

Stalactites and stalagmites in a beautifully lit cave.

New Preston and Kent, Connecticut - where Friday the 13th, Part 2 was filmed.

The largest ice cave in the world is thought to be the entrance to hell according to Austrian legend.

Walk through depictions of the torture inflicted on those who go to Buddhist hell.

This "dead marsh" sits among the largest sand dunes in the world, a forest frozen in time.

The quaint little Vermont town played a quaint little Connecticut town in Tim Burton's "Beetlejuice."

The ghost town that was one of New Hampshire's first settlements now exists as a park detailing its history.

Mysterious hillside with a continuously burning natural fire.

A cave covered with bizarre stalactites of cloth.

Abandoned limestone cave was once a sacred place of worship.

A cave dug by a man directed by ghosts to find pirate treasure.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

Eyam took steps to quarantine themselves and keep the plague from spreading.