Museum dedicated to the terror regimes of Hungary.

An extensive, if one-sided, history of U.S. law enforcement's war on drugs.

The bust of Romania’s most notorious ruler, Vlad Dracula aka "Vlad the Impaler," keeps watch over the ruins of his medieval court.

Europe's largest natural bridge has a 19th century royal chateau built into its side.

A marvel of Byzantine engineering under the streets of Istanbul.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

The oldest hotel in the world has been operated by the same family for over 1,300 years, even catering to samurai.

These tombs were built into the side of a mountain so that ancient angels could reach the dead.

The trials and tribulations of marking Poe's grave.

Each spring, a dreamlike carpet of bluebells overtakes the forest floor.

A magically clear, blue river that seems to spring from nowhere.

The hallucinogenic center of the ancient world.

An unusual round church in London with a Templar past.

A take-out restaurant that only serves cuisine from countries with which the United States is in conflict.

Better known as the "Body Farm," this unique research facility has been studying how human bodies break down since the 1980s.

A sprawling Baroque park with 300-year-old hydro-pneumatic waterworks.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

Roman ruins top white travertine terraces formed by ancient hot springs.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

Stalactites and stalagmites in a beautifully lit cave.

Its buzzing collection honors vibrator history.

The remains of diamond fever taken over by the desert.