You'd never know the houses at 23-24 Leinster Gardens were fakes—until you see the train tracks on the other side.

The oldest inn in England served brew to the crusaders.

Hidden in a grotto 26 feet below Nottingham's oldest hotel, this stylish subterranean drinking den is notoriously hard to find.

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

This ruin in a suburban park may be the place where Shakespeare's "A Midsummer Night's Dream" was first performed.

Built by the patron saint of illusionists this Elizabethan manor house is riddled with secret cubbies for hiding priests.

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

Mysterious chains and iron stakes adorn this strange grave, with no explanation.

The remains of the wrecked steam trawler can be found on the beach at low tide.

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.

These remarkable cascades are the jewels of Upper Tees.

A subterranean ice warehouse that has lain hidden beneath central London for over a century is now open to the public.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

A student driver's nightmare.

One part local history, 99 parts gruesome haunted house.

The longest hedge maze in the world.

A tongue-in-cheek arcade where the games are based on everyday life.

360° views of the city plus five floors of optical illusions and hands-on science.

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

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

A 30-acre garden inspired by the principles of modern physics.

The atmospheric road was never meant to be so creepy.