A magnificent waterfall is also home to the remains of a Roman hydraulic engineering system.

In Rome’s Jewish ghetto, a 200-year-old bakery still makes the neighborhood’s historic sweets.

In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

A student driver's nightmare.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

Only a few pieces remain of the structure that carried people and goods across the Thames for some 600 years.

A museum that chronicles the interesting and often dark history of the London docklands, once one of the major trading ports of the world.

One of the figures in this Celtic sculpture continues to puzzle archaeologists.

Buried for centuries, this hidden cellar is all that remains of London's medieval Whitefriars Monastery.

A unique tribute to the millions of animals who served and died for the British military.

An unusual ode to the late Irish playwright, complete with a squiggly bust and coffin-shaped bench.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

No one knows who created the statues or if they are arranged properly—let alone the artwork's real name.

A ceramic postbox where visitors can post original poems and creative messages.

This small memorial honors a ferocious feline and local hero.

Cascading waterfalls mark the gateway to the ancient burial place of Clan Macnab.

This tiny getaway tucked away in an uninhabited Scottish valley isn't your ordinary teahouse.

The former seat of power for the Balliol dynasty.

A bizarre stone beast lurks on the beach of a popular tourist island.

An abandoned, desolate train tunnel that was used during World War II.

This was once a hall in which a 16th-century royal banquet was hosted by King James VI of Scotland.