A giant scrap metal troll rests his hands on top of a dilapidated building covered in graffiti.

The site of an early Arthurian battle and the dwelling-place of prehistoric people and (possibly) an ancient race of giants.

Structure built from the skulls of vanquished foes.

This Hungarian stilt village is built in a lake that never freezes over due to the power plant that that uses it as a cooling pond.

Unruly residents were housed in this one-person cell until the Black Maria arrived.

Take a ride back in time with a steam locomotive trip through Eritrea’s mountainous countryside.

In the heart of Luxembourg's "little Switzerland" weaves a breathtaking natural sandstone canyon with a mythological past.

Only 68 people per day are allowed to visit this New Zealand bird-watcher’s paradise.

Where Kevin Eastman and Peter Laird created their "heroes in a half shell" and founded Mirage Studios.

Crumbling remnant of Rio's colonial past tucked behind Corcovado mountain in the neighborhood of Cosme Velho.

There's light and a dreamlike panorama at the end of this tunnel.

This 317-ton walkable art installation is an homage to Korea's "City of Steel."

Mounds of fine golden sand that can rise nearly 500 feet tall.

Outside a hilltop monastery in India, a monument to a 20th-century Russian mystic.

An underground world of gorgeous, palatial metro stations designed as a nuclear shelter complex.

Thousands of graves lurk below the surface of this park.

This Connecticut ferry has been operating in some form since 1655.

The mastermind behind this palatial hotel perished on the Titanic weeks before its grand opening.

The largest hand-carved, outdoor sculpture collection in the state of Maine.

The tomb of one of the greatest travelers in history.

Last residence of H.P. Lovecraft featured in his story "The Haunter of the Dark."

A stranded woman lived alone on this remote island for 18 years, inspiring the great children's novel "Island of the Blue Dolphins."

A small museum filled with over 1,000 clocks, and one particular clock calibrated to run until the year 9999.

A ghostly mansion in the middle of downtown Tunis.