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

A closed London rail station created to cart away the dead still bears the marks of attempts to make it less morbid.

The (fictional) address of Sweeney Todd's bloody barbershop.

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

Originally meant to hold a statue of King William IV, this support sat empty for years. Today, it hosts a rotating cast of public artwork.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

This third-generation institution is one of the last in London that still cures its own salt beef for epic sandwiches.

An oddity of a bygone era that stills functions today.

The Tudor-style cottage in the middle of the square is not quite what it seems.

This tribute to the fictional detective stands at the famous literary character's address.

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

An ancient healing font dedicated to an 11th-century matriarch was moved to make way for progress.

This stack of stones honors a murdered 18th-century woman.

These plaques located in a court preserve a small piece of Edinburgh's history.

The remnants of a facade from a 19th-century market stall emporium.

A pristine crater lake 12,000 years in the making, with waters like cut glass.

These bronze horses on the gates of the Royal Palace of Naples were a gift from a Russian tsar.

This 17th-century passageway is home to numerous bookshops, a witch legend, and the oldest pizzeria in the world.

The Neapolitan Cult of the Dead still cares for the skulls at this mini-Fontanelle.

The once forbidden "secret cabinet" of erotic art from excavations of Pompeii and Herculaneum.

Every day is like Christmas on this street where the traditional Neapolitan nativity scene comes to life.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

The walls and streets of the ancient city are peppered with penises.

Erotic art covers the walls of the largest ancient pleasure palace.