This ruined medieval castle was the scene of Lord Robert Dudley’s seductive reception for Queen Elizabeth I.

This bridge is the first to be made entirely from iron, but designed like it was still made of wood.

This ornate English estates "Prodigy House" still bears the cannonball marks of civil war.

The last occupied troglodyte dwellings in England weren't abandoned until the 1960s.

Eighty million natural history specimens call this gargantuan museum home.

A Neolithic burial tomb connected with a colorful array of legends.

No need to strap in for a "ride" on this walkable roller coaster.

The "stairway to heaven" lookout tower was built to resist weather, arson, and the laws of physics.

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

From Tintin to the Smurfs, Europe's greatest graphic icons are celebrated in a grand Art Noveau gallery.