These slanted cubic abodes are a creative if odd solution to a zoning pickle.

This hotel was once home to a steamliner company and became the final rest stop for Europeans heading to the New World.

The hallucinogenic center of the ancient world.

Step inside an ancient beehive tomb built for a mysterious cult hero.

This 15th-century island fortress later served as home to the executioners no one wanted to live near.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

An abandoned saucer-shaped monument in the Bulgarian mountains.

Budapest's Communist-era statues, banished to the suburbs.

The world's oldest grape-producing vine has survived four centuries of turmoil and even has its own anthem.

This one-time health resort was used by aristocrats around the world.

Colorful and chaotic stacked hotel in North Holland.

This large sand dune in the Netherlands is home to wind-whipped trees with "floating" roots.

This disused VLF radio station is no longer in service but the surrounding town still bears its name.

The tallest waterfall in the Netherlands is a lovely, stepped feature that is only 50 feet tall.

A moving memorial to the fallen and missing from WWI trenches.

Experiencing Guatemala's sensory-exploding church is a blunt reminder of European influence.

Central America's deepest lake is actually a volcanic caldera, surrounded by three volcanoes.

This subterranean disco dance club in a Cuban cave comes with bright lights and a dark legend.

The ruins of an abandoned medieval city where the last Byzantine emperor was crowned.

This wrecked ghost ship has been rusting on a Greek beach since the 1980s.

This ominous Albanian fortress houses tanks and downed planes as a reminder of their victories over Western imperialism.

An Albanian monument to the Communism that nearly crushed the country is now a crumbling wreck.

Once the fallout shelter of a dictator, this sprawling bunker is now a combined history museum and contemporary art gallery.

A medieval bridge stretches over a sulfur-rich river that leads to year-round natural hot springs.