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

The oldest olive tree in Greece has been bearing fruit for at least 2,000 years.

The Cycladic architecture makes this Athens neighborhood feel like an island paradise hidden in the shadow of the Acropolis.

This legendary city has been a tourist attraction for centuries.

Hidden in a secluded Greek cove is a pristine beach marred only by the rusting smuggler's hulk stranded on its shores.

A miniature train-ride through Slovenia's largest cave system.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

These natural cliffs look like they are a part of an old castle complex.

A striking symbol of the Bulgarian capital.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

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

This town named for the ancient God of War is home to fewer than a thousand people, but it's the birthplace of the Greek Revolution.

These sea caves are the source of Xigia Beach's distinct aroma.

The first declared National Monument in the United States.

A fitting attraction for the corn capital of the world.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

The fairy tale castle of the "fairy-tale king."

Windblown rock formations in an ancient Roman quarry.

A gorgeous stone viaduct crosses over a bucolic valley.

Two stunning 17th-century libraries and a cabinet of curiosities.

The hidden lair of an alchemist rediscovered in a 2002 flood.

This Czech church doubles as something of a permanent fashion exhibition for a statue of the Infant Jesus.

One of the famous Czech artist's lesser-known Prague installations appears to be a glowing fetus affixed to a drainpipe.