The London pub overlooks where the Mayflower was moored before setting sail for the New World.

Repository for more than 22 million pickled specimens.

Eighty million natural history specimens call this gargantuan museum home.

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

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

The barrel-made lookout from Shackleton's final ship is tucked away in the crypt of one of London's oldest churches.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

Murals of the wild parties once held on the frozen River Thames.

The last remaining example of the boatmen's perches that once dotted the south bank of the Thames.

The "beautiful" equation predicting the movement of all electromagnetic particles is engraved in front of Newton's tomb.

A surrealist timepiece by the artist of melting clocks.

France's most famous cemetery, with some of its most curious tombs.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

A haunting collection of the vanished and disappearing natural world.

Notorious artist squat renovated into legal studios.

Noirish green neon marks the location of one of the oldest private detective agencies in France.

This banal Parisian entranceway is not what it seems.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

A mechanized clock where a man fights off a dragon, crab, and rooster.

The very center of Paris is surrounded by a bevy of strange good luck rituals.

A majestic lion statue guards this Parisian botanical garden, and feeds on an unsettling item.

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the century.

One of downtown Berlin's last reminders of its Communist past.