This beachside town is home to a diverse nature reserve, multiple cays, and one of the three bioluminescent bays in Puerto Rico.

This Stone Age solar temple aligns with the sun on each equinox and solstice.

This unique building in the main square stands out among the city's typically Baroque architecture.

The ancient heart of Tunis is an enormous maze of narrow streets and alleyways.

An ancient burial ground believed to have been used for ritual sacrifice.

An ancient Phoenician citadel once stood at the site where Queen Dido first landed, according to legend.

Sleep in a climate-controlled plastic bubble for the night.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

A little sculpture with a large wardrobe.

Thermal springs underneath the seabed provide the heat and bubbles for these beachside natural hot tubs.

This historic hiding place, often used by people escaping slavery, is a testament to a heroic struggle for freedom.

The smaller of the three towers of San Marino is a former prison inaccessible from the ground level.

The oldest-known example of a historic architectural style recognized by UNESCO.

The largest Roman amphitheater in the Balkans once held over 20,000 people, but managed to lay hidden for hundreds of years.

According to a local legend, this old castle could only be built after a woman was immured in the walls.

The "dragon babies" of southeastern Europe.

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

A whimsical bridge adorned with decorative dragons.

A peculiar museum that includes many drunken tales, a drunk driving simulator, and much more.

Legend has it that Napoleon Bonaparte fell in love with this Gothic church.

3,000 market stands in five former Zeppelin hangars.

The statue of a legendary giant who carried Christ and shouldered the world's sins.

Flamboyant architecture from the turn of 20th century.

Mysterious craters may have been home to an ancient cult.