The water here is so clear you can see the mysteriously sunken ship from the surface.

The ruins of this antebellum sugar plantation are the end result of a Seminole attack during the Florida Wars of 1836.

12,000 sq. ft. museum tracing erotic art from antiquity to modern times.

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.

The unfinished final resting place of some of Spain's most prominent politicians.

A unique exhibit lets blind people experience famous works of art and architecture with their hands.

An iconic and controversial ancient Iberian funerary urn with a hauntingly penetrating gaze.

Among the oldest structures in Madrid, these Moorish walls once guarded the medieval city of Mayrit.

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

A 19th century artistocrat's mansion, turned into a library, hidden in a modern library.

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

Catacombs turned marketplace.

Several plaster noses are hidden in plain sight around London's Soho neighborhood.

Eighty million natural history specimens call this gargantuan museum home.

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

Banksy gives themself artistic license with this piece of London street art.

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

This collection of illusory paraphernalia has been culled from the history of London's premier magician's club.

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

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

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

This hidden rooftop garden in downtown London offers a quiet respite from a bustling city.