19th-century scientists would make the pilgrimage here to verify the precision of their measuring sticks.

A mysterious pair of mice eating a piece of cheese is London's smallest public sculpture.

A hidden treasure in London with a rich medieval history, and the resting place of many luminaries.

Mary Kelly was last seen here before she was murdered by Jack the Ripper.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

Hear the quietest sound from across the dome.

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

Remnants of cells from the most notorious London prison may lie in the basement of a rare Victorian Gin Palace.

An artistic tribute to the famous singer, just around the corner from where he was born.

This London plaque marks the spot where David Bowie's famous alien made his debut.

A cluttered and astounding collection of antiquities and curiosities.

The site of London's first coffee house has been serving refreshments of one kind or another for 360 years.

A vast overgrown cemetery, once known as one of London's "Magnificent Seven."

One part local history, 99 parts gruesome haunted house.

The first U.S. town to secede from the Union, only to vote themselves right back in.

A rich history stashed behind an unassuming door in the heart of Gold Country.

An abandoned lot littered with concrete debris was once the home of the world's first female railroad president.

This Nevada lake holds its titular natural pyramid and, if the legends are true, a number of dangerous spirits.

BDSM, 1930s Style.

Two awe-inspiring globes from the reign of the Sun King hang from the ceiling of France's national library.

A popular shrine where the Blessed Virgin allegedly appeared in 1830, displaying a holy armchair and two incorruptible remains of Lady Saints.

This surreal statue brings a famous French novel about a supernatural cad to arresting life.

In the best of all possible worlds, everyone will get a chance to see this statue in which Voltaire's heart is interred.