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

The library houses an incredible collection of some of the world's most impressive books and manuscripts.

A scenic UNESCO site that doubles as a habitat for various forms of wildlife.

One of 200 religious buildings recognized as a “culture monument.” 

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

The narrowest street in Paris.

This handsomely carved wooden church is more than 800 years old.

The design of this beautifully crafted building was inspired by Norwegian glaciers.

This floating sculpture of ice is a poignant reminder of nature's power.

This 400-year-old tree is actually an immigrant from North America.

The site where two doves fell in love.

This demon atop the Notre-Dame de Paris looks utterly bored.

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

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

A surrealist timepiece by the artist of melting clocks.

This modest marker near Notre Dame identifies the very center of Paris.

In this town's main square resides a statue of none other than the 43rd President of the United States.

A UNESCO-protected spiritual seat of the Old Serbian Kingdom and Empire.

A monastery considered a state-protected cultural monument of exceptional importance, founded in the 14th century by Serbian King Stefan Dečanski.

This lonely minaret with an unusual decorative symbol is all that remains of a historic Ottoman mosque.

This 15th-century Ottoman bridge was modified to keep up with the changing course of the river Erenik.

This triumphal 16th-century arched gateway leads to the oldest street in Palermo.

Thousands of well-dressed mummies below a monastery.

"Stairs of the Turks", a chalky white cliff eroded conveniently into stairs, allowing for easy pillaging.