Catacombs turned marketplace.

This famous archeological mystery may be an ancient example of movable type.

A Bronze age settlement on the Greek island of Santorini might have been the inspiration for Plato's Atlantis.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

A statue in the center of Dublin dedicated to one of their favorite sons of rock & roll.

An incarceration museum on the spot of possibly the oldest prison in England.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

Museum celebrating the ocean, with the largest wunderkammer dedicated to sea exploration.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

This one has sailed five times as far as Sir Francis Drake's famous ship.

Eighty million natural history specimens call this gargantuan museum home.

England's oldest surviving hedge maze has been confusing visitors for over 300 years.

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

The ruins of this gorgeous clifftop castle look like something from a fantasy novel.

This smily stone feline is meant to represent a mythical lion that almost destroyed the island of Kea.

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

One part local history, 99 parts gruesome haunted house.

A historic London cemetery now serves as a nature park incorporating gravestones & memorial statues.

Hideout of thieves, monks, and goat-footed gods.

What once sat in the world’s spotlight is today a largely disused ghost complex.

Large collection from the 3rd millennium BCE.

Where commuters walk through remnants of an ancient Greek necropolis.