The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

A monument to the man who almost killed Hitler.

Started as a kitchen garden, now the second largest botanical garden in the world.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

Elevated freight railway turned wildly successful urban park.

A crumbling hospital from the 1850s on Roosevelt Island.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

A brush maker used his factory to protect blind Jews from the Gestapo.

Berlin's old airport.

An abandoned NSA listening post on Berlin's "Devil's Mountain."

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

The most visited, and possibly most controversial, museum in Germany.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

Eighty million natural history specimens call this gargantuan museum home.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

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

The modern birthplace of Irish freedom.

A particularly disconcerting tribute to Irish martyrs.

The 19th-century pharmacy (now a used bookstore) was featured in James Joyce’s "Ulysses," and has changed very little to this day.

This whimsical fountain pays tribute to Toronto's four-legged friends.

A monument to the 17,000 Chinese who worked and died to build Canada's Pacific Railway.