This Polish cave has housed a dragon, a brothel, and an enduring legend.

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

Just outside Lesotho's capital city, a rock formation takes the shape of a powerful predator.

This African beach is home to thousands of rare mainland penguins that are known for their annoying voice.

The bluer than blue waters in these natural Israeli caves are reached via the world's steepest cable car.

Ghost Town in the Demilitarized Zone of the Golan Heights.

Dozens of elegant ceramic tiles decorate these ancient walls, each displaying the Lord's Prayer in a different language.

The tallest waterfall in the Judean Desert is named for its connection to a biblical figure.

On any given day this sprawling market houses literally tons of government-regulated gold, gems, and precious metals.

It appears as if a man is standing behind this giant airport clock, painting the hands in real time.

The world's longest and deepest train tunnel.

This statue of the great Argentinian car driver is located near a famous curve of the Monaco Grand Prix.

An ornate private entrance to the Vienna subway built specifically for the emperor.

Climb around the high waterfalls on series of iron ladders and bridges within the wildest gorge in the Slovak Paradise.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

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

Rock carving created 1,300 years ago 75 feet off the ground.

A little-known park with unusual, half-ruined structures and a mystical energy.

What happens when you cross a mayor and a painter?

A misnamed well, with a deep dark past.

A towering spire in the fortress of Kalemegdan honors the victorious armies of Serbia during their struggles against the Ottoman Empire.

An ethereal glowing blue ocean cave in Croatia.

This exclusive resort has completely covered a tiny Balkan island in a 5-star warren of guest rooms.

The Guardian of Tallinn.