A volcanic fissure over two miles long and up to 70 feet deep.

Unknown to many, this sparkling turquoise lake hides amid Oregon's snowcapped mountains.

The bright red stripes streaking across the rocks are the star feature at this Icelandic waterfall.

Strange rock formations tower above the river that snakes through this enchanting Icelandic canyon.

Climb right into the heart of this colorful Iceland volcano.

Iceland's largest lagoon is home to stunning multi-colored icebergs.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

An unsolved murder victim's grave which may or may not contain her body.

This scented city oasis was a labor of love.

This nine-story building can be played like an instrument.

These strange large stones served as a campsite and lookout post for generations of Native Americans.

One of the last active volcanoes on the Eastern seaboard.

A cave on the Maryland border where civilians took refuge during the bloodiest battle of the Civil War.

Hellam Township is reputed to feature seven remote gates, which when passed through in the right order, open an entrance to hell.

A modern ghost town whose inhabitants were driven away by the growth of nuclear power.

A historic covered bridge is but one example of an oddly prevalent American urban legend.

The internal railway of one of the biggest steel plants in America has been transformed into a linear park with unique industrial views.

Mysterious rocks that ring musically when struck.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

This evocatively named natural crevasse was created by a torrent of water that smashed right through a granite deposit.

This miniature feudal castle was built on a whim to honor a US Navy pioneer.

The Mysterious Witch Bonney, a haunted statue in an old industrial city.

An enormous, inside-out glass globe built in 1935.