Two plaques commemorate the site of Shakespeare's first theatre.

An unusual round church in London with a Templar past.

Hear the quietest sound from across the dome.

London's smallest police station is barely the size of a phone booth.

The final resting place to 300 Victorian-era pets hides inside the city park.

Repository for more than 22 million pickled specimens.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

The monster at the center of the Darwin Center Spirit Collection.

A naturally mummified 2,000-year-old man.

Eighty million natural history specimens call this gargantuan museum home.

Scattered throughout London are ancient remnants of the city's former bounding wall.

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

It houses the remains of a 17th-century version of the Titanic.

An exact replica of a colossal Olmec head sits atop a pyramid within a Madrid traffic circle.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

Commonly acknowledged as the only public monument to the Devil himself.

An ancient Egyptian temple in the middle of Madrid, Spain.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

The mummified heart of a saint lives on in this church—after a brief hiatus when it was stolen.

The Guardian of Tallinn.

The oldest church in the Estonian capital is home to over 100 fantastical cemetery coats-of-arms.

A saintly relic hidden in a Prague church basement.

When you're a great Russian Tsar, even your vomit gets a statue.