A luxury hotel constructed out of a former jail.

The final resting place of a legendary science fiction author and his fraternal twin sister who died as an infant.

The romantic botanic tunnel feels like a well-kept secret.

An abandoned railroad tunnel transformed into a creepy path for hikers and cyclists.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

A giant scrawl on the skyline of south London.

This unassuming alcove in London’s famous Tower Bridge once served to capture, store, and display dead bodies from the River Thames.

A community-run museum invites visitors to explore Jewish communities before and after the Holocaust.

Montreal's giant farmer's market is a foodie's best friend, especially in the winter months.

The celebrated eyesore created by starry-eyed sweethearts.

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

Eighty million natural history specimens call this gargantuan museum home.

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

Oldest surviving example of a Dutch saltbox frame house in America.

A small house sits between two huge rocks, with its back to the sea.

This 150-year-old train station and caboose have been turned into a railroad museum, enjoyed by young and old alike.

Tucked away amidst some of the most famous addresses in the world is New York’s only fraction of a street.

A favorite Paris bar for U.S. expats, including Gershwin, Hemingway, and James Bond.

France's most famous cemetery, with some of its most curious tombs.

The bones of two medieval royal lions were discovered at the historic fortress.

This bewitching Babylonian goddess haunts a hallway of the British Museum.

A classic roadside attraction on Vermont's historic Route 5.

Millions of numbers carved in glass represent the tattoos forced upon victims.

The world's largest piece of copyrighted artwork.