Eighty million natural history specimens call this gargantuan museum home.

The London statue that imitates passersby.

This beautiful deer park was built so King Charles I and his court could go hunting while escaping a deadly plague outbreak.

An eccentric 18th century naval officer built a ship's quarterdeck on his roof, the inspiration for Mary Poppins's "Admiral Boom."

A subterranean shelter remains intact under a busy Paris railway station.

A brick foundation and piles of listing building materials are all that remains of this World War II POW camp.

What's left of the ruins of the 1893 Columbian Exhibition, or World's Fair, also known as the White City.

A collection of 100 brains preserved in jars on the UT campus.

A book collector's dream, this Toronto bookstore has the world's first "Biblio-Mat," a random book vending machine.

The first green space constructed on an elevated viaduct.

A museum of carnival attractions where you are invited to ride the rides.

England's most famous front door has an accidental doppelganger.

A statue of the original Pearly King is hidden in a church's crypt.

This historic building displays the remains of a victim of the devastating 14th-century plague.

The ritual has been performed uninterrupted for nearly 700 years.

The fences outside some of South London's estates are made from recycled World War II stretchers.

Since 1887, this old-school shop has stacked its shelves with extraordinary coffees and teas.

A recently restored Shoreditch landmark with ties to Jack the Ripper.

The majority of the museum's large collection is held in a storage space open to the public a few times a year.

The wooden telephone box hidden away in London's Piccadilly was the original prototype of the iconic kiosk.

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

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

This South London cemetery holds the remains of more than 15,000 people.

Hidden beneath the streets of London is a secret subway that only carried mail.