St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

This 700-year-old structure is one of the most unique architectural and historic monuments in Gdańsk.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

An underground city of salt.

Europe's largest prehistoric mound – burial site of a legendary king?

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

Hear the quietest sound from across the dome.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

A hugely vast Irish landscape of barren rock that stretches for miles.

The oldest pub in Ireland may also be the oldest surviving bar in the entire world.

Islanders once used this dramatic, otherworldly landscape to hide their cattle from Viking raiders.

The most loyal of little dogs, or a Victorian era publicity stunt?

A scattered trail of street art adds a pop of color to the city's stark structures.

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

Ancient cliffs resembling a kilt on Scotland's second largest island emit an entrancing sound.

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

The largest stone circle in the world has ended up bringing up more questions than it has answered.

J.R.R Tolkien, C.S. Lewis, and other "Inklings" met at the Oxford pub to discuss the now legendary fantasy stories they were writing.

Don't be fooled by this fake medieval facade even if it is almost 300 years old.

Created by one of England's most prolific labyrinth designers, inspired by Bath city history.

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.

Climb inside an iron crystal magnified 165 billion times its normal size.

Northern Ireland's Brobdingnagian stepping stones.

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