This museum explores the lives of Chang and Eng, the "Original Siamese Twins."

This North Carolina grave is the final resting place of the world's most famous conjoined twins.

Andy Griffith's hometown has made itself up to look like the fictional town of Mayberry.

Every inch of this chapel is covered in craftsmanship from across the world.

This triumphal 16th-century arched gateway leads to the oldest street in Palermo.

Behind medieval walls in a corner of bustling Palermo is a breathtaking former mosque once inhabited by a wolf-taming hermit.

The floor of this spectacular Baroque sanctuary is covered in memento mori.

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

This magnificent castle grew from a small Moorish fortress, and reportedly inspired two iconic Disney castles.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

According to the Guanches, the aboriginal people of the Canary Islands, the king of evil lives inside this volcano.

Giant topiary dog once played a role in a terrorist bomb plot.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

A lush indoor jungle fills this bustling Madrid transportation hub.

Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

The remains of a small medieval chapel mark the legendary birthplace of the patron saint of Wales.

The longest and tallest aqueduct in Britain can actually be sailed across.

A former fisherman's hut deemed too small for habitation is now a delightful tourist draw.

This Welsh village gave itself a ridiculous name in a publicity stunt a century ahead of its time.

The Stonehenge of Wales is one of the grandest neolithic dolmens still in existence.