This fresco-covered medieval monastery hangs from the side of a steep cliff.

A Serbian church lit by chandeliers made of weapons.

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

Terrifying derelict military hospital once housed a recuperating Hitler.

This World War II bunker now survives as a documentation of the Nazi regime and war crimes.

This Berlin island is home to a flock of free-roaming peacocks, as well as a historic ivory folly.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

A whimsical European-style chateau that calls the coast of Chile home.

Mysterious Incan ruins on a tiny island in Lake Titicaca.

An impressive collection of massive radio satellites.

A plaque commemorates the spot in the Oregon woods where the first-ever Geocache was hidden.

This tower once served as a radar station during the Cold War.

For decades, these ships have been lying in rust awaiting a final decision on their fate.

The remains of a concrete ship sit on a sandbank between Ballina Quay and Belleek Woods.

The atmospheric road was never meant to be so creepy.

This 3,500 pound obelisk was constructed with more than 1,000 reclaimed guns.

Once a bustling fishing port, this semi-ghost town is now more than 90 miles away from the shore.

A self-built mosaic house and sculpture park.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

The precise origins of this pink sandstone temple are unknown.

An isolated 17th-century chapel on a remarkable site once dedicated to Celtic sun worship.

A remote hilltop covered in giant monoliths haunts the Brittany countryside.

Popular tourist destination now stands as a memorial to Sam the koala.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."