If you’ve ever seen a picture of Machu Picchu, then you’ve seen a picture of Huayna Picchu—you just didn’t realize it.

Plundered and left asunder by grave robbers, this ancient necropolis has been painstakingly pieced back together.

The mouldering manses of wealthy colonials still pock the streets of a Curaçao neighborhood.

The oldest steel ship in Iceland has been beached for years and is now a rusting ruin.

This wrecked airplane has been sitting on a black sand beach since the 1970s.

The oldest (maybe) swimming pool in Iceland is a stunning oasis built into the side of a lush hill.

A floating underwater hotel, created by a Swedish artist.

A series of modernist treehouse hotel rooms grace the outskirts of an Arctic forest.

When this test site was abandoned, they didn't even bother to take the rocket with them.

An abandoned water sports stadium that has become a haven for graffiti and decay.

Gutted airplanes slowly decay in a Florida field.

An underwater city for the dead.

An exquisite panometer representing Dresden as it was from 1695 to 1760.

The ruins of an abandoned crematorium haunt an eerie deserted German cemetery.

The Bauhaus-style former industrial complex is considered the world's most beautiful coal mine.

Originally envisioned by King Ludwig II to rival Versailles, Herrenchiemsee's "New Palace" remains half-gilded for lack of funds.

Hitler's bleak vision of relaxation still stands as a mostly abandoned 10,000-room resort complex.

This abandoned coliseum was intended to be a grand Nazi rallying ground before it was halted at the end of the war.

This temple to the sturm and drang of Richard Wagner contains a dragon's cave and reptile zoo full of living "dragons."

An industrial relic is now one of Europe's most staggering art spaces.

A former ironworks that was the first UNESCO industrial site.

A striking 12th-century-style castle built on the edge of a cliff.

The music is over at the Ballhaus Riviera Ballroom, but the ballroom remains in haunting disrepair.

The 1936 Summer Olympics site is a crumbling remnant of sportsmanship and a history its host country would like to forget.