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

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

Famously misunderstood wonder of the ancient world

A kaleidoscopic warehouse-maze of handmade neon signs.

The sign at the garden gate reads: "These Plants Can Kill."

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

This medieval chapel is now a shrine to the region's favorite sport.

In France, a medieval-style home pays homage to an intrepid explorer who discovered Québec.

The sunken structure looks like the victim of a catastrophic flood.

One of the largest ochre quarries in the world, hidden in a limestone landscape.

This narrow path was cut right into a French mountainside to feed the country's early naval expansion.

A French library that makes sure its love of books is writ large... giant in fact.

An off-the-beaten-path boutique stuffed with an eclectic collection of upcycled goods.

A medieval church with largest and oldest collection of Renaissance frescoes in France.

Statue of a decomposing prince that once held his heart in its hand.

Hundreds of secret cabinets built into the walls of legendary poisoner's private work room.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

For hundreds of years, automatons moving to metallic music have been marking the passage of time.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

A beautiful and classically designed villa, with an hourly infestation of monsters.

Ancient paintings known as the "Sistine Chapel of Cave Art."

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

The history of radiation is on safe display at the foot of a radiation science laboratory.

Known as the "Dodo Manège," this carousel features a herd of animals that have disappeared—or may be gone soon.