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.

One of the largest underground systems runs under Canada's largest urban center.

This massive, ancient stone was disassembled and then put back together again.

The Incredible Hulk, Yoda, Mulder and Scully, and many many others watch over the mean streets of Toronto.

A collection of more than 12,000 shoes, displayed in a building shaped like a shoebox.

This colorful creation wasn't always a welcome part of Toronto's Moccasin Trail Park.

A unique collection of Science Fiction, Fantasy, and everything in-between.

The Victorian-era greenhouse is stuffed with tropical plants, and open 365 days a year.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.