An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

A museum of carnival attractions where you are invited to ride the rides.

Paris' linguistic guide to the international language of, yes, love.

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

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

The home of one of America's most wealthy industrialists is now a historic site that remembers a more decadent time in the country's history.

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

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.

This unusual structure may be on its way to becoming a cultural landmark in Toronto.

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

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

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

This Toronto garden collects stares and tchotchkes in equal measure.

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.

First a root beer ad, then a golf course clubhouse, and finally a massive teapot.

Visit on a Sunday morning to see some killer tricks.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

Color-coded signs direct drivers on a network of routes designed to avoid Pittsburgh traffic.

A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

A restored Pittsburgh house of God has been converted to a marvelous house of suds.