Lyon, France is home to two remarkably preserved Roman theaters, one dating back to 15 BCE.

For hundreds of years, automatons moving to metallic music have been marking the passage of time.

Hundreds of hidden passageways weave through the old quarters of Lyon.

The largest crypt ever constructed in France was built in the 11th century on an ancient Druid sacred site.

The famous winding walk at Chartres is surrounded in mystery and myth.

A sublime medieval path adorns the marble floor of one of the most beautiful Gothic cathedrals in France.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

A medieval abbey featured on 'Game of Thrones' that dates back to the 12th-century.

Step into Narnia at this small park featuring statues from "The Lion, the Witch, and the Wardrobe."

400 million years of erosion shaped these fascinating seaside caves, which made an appearance on 'Game of Thrones.'

A Victorian marvel of engineering is now a 21st-century tourist attraction.

The only monument to name all of the passengers and crew who died on the RMS Titanic.

This tiny train shuttles passengers to one of Northern Ireland's most spectacular sights.

The ruins of this medieval castle in Northern Ireland have inspired artists from C.S. Lewis to Led Zeppelin.

A meandering boardwalk across the bogland leads to a "stairway to heaven" with sublime views.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

Northern Ireland's Brobdingnagian stepping stones.

The atmospheric road was never meant to be so creepy.

A subterranean playground in an abandoned slate mine.

One of the few surviving street funiculars in the world.

Stroll through Welsh history in a village of reconstructed structures.

A 19th-century funicular railway shuttles visitors up this surprising sea cliff to one of the world's largest camera obscuras.

Picturesque ruins once held off mighty armies.

A wildlife paradise, this island is one of the world’s most important habitats for burrow nesting seabirds.