Once designed as the entrance to Buckingham Palace, this structure was later relocated and stands as a victory arch.

A memorial for public executions that dates back to the 14th century.

The world's longest continuously running show has played at this small West End theater since 1974.

Order a salt beef-loaded beigel at any hour of the day or night at this East End institution.

Down a pint of ale where the Bishop of Ely's servants slept in 1546.

This third-generation institution is one of the last in London that still cures its own salt beef for epic sandwiches.

This abandoned church in central Lyon is missing its front stairs.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

A book collector's dream, this Toronto bookstore has the world's first "Biblio-Mat," a random book vending machine.

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

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

Known as "Toronto's Flatiron."

An abandoned 1970s theme park that has been turned into a space for waterfront walking.

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

This urban oasis is a marvelous meld of music and landscape architecture.

This nine-story building is the oldest standing skyscraper in D.C.

A fantastic place to see murals, and an important location in the history of Toronto's legal street art scene.

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

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

The innocent intentions of this monument are somewhat lost in the sculpture's muscled imagery.

Legend has it that President Grant’s frequent drinking in the lobby gave rise to the term “lobbyist.”

D.C. once had its own tiny rival to the New York Stock Exchange.

The winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.

These unusual rooms on wheels are holdovers from the 1960s.