An unusual round church in London with a Templar past.

This 1920s Dutch barge is now a floating bookstore.

Banksy gives themself artistic license with this piece of London street art.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

A kaleidoscopic warehouse-maze of handmade neon signs.

The celebrated eyesore created by starry-eyed sweethearts.

During the summer months, giant teddy bears take over Paris near Les Gobelins metro station.

The video game-themed street art first popped up in the French city.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

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

The first green space constructed on an elevated viaduct.

A surrealist timepiece by the artist of melting clocks.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

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

The vast, legendary catacombs hold secrets much stranger than stacked bones.

For 60 years, skiers have calmed their nerves with cocktails hidden along these slopes.

You have to know where to look in this rather ordinary-looking square to find hints of its past as a dissidents' cemetery.

The narrowest house in Buenos Aires is less than 10 feet wide.

These small sculptures pay homage to the lovable star of an iconic Argentine comic strip.

A tower devoted to — and modeled after — the Divine Comedy.

The design of the Palacio Salvo has been described as "a lighthouse on top of a building."

Where sweethearts leave their love locks in the Uruguayan capital.

The remains of Uruguayan hero José Artigas lie beneath a monument in Montevideo’s main square.