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

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

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

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

Controversial tribute to the heavyweight champion boxer who grew up in Detroit.

This sprawling bookstore spans four floors and has more than a million books in stock.

This riverside restaurant has been serving customers since 1146.

A whimsical art tower at a Bavarian brewery includes a grotto for its mythical beer-brewing dwarves.

Concrete pillars provide a beautiful canvas for Quebec City's graffiti artists.

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

This steep cable railway has been hoisting passengers in the heart of Québec City for over a century.

A historic Montreal market that was the city's agricultural hub for over century.

The only example of a Paris Métro sign in use at a subway station outside of the French capital. 

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

Launched by Napoleon's soldiers more than 200 years ago, a cannonball remains embedded in the tower wall.

A statue in Budapest's Liberty Square honors the former U.S. president's efforts to end the Cold War.

A museum dedicated to a secret military hospital hidden beneath a castle in Budapest.

A series of caves under Castle Hill that once held the prisoner Vlad Tepes, better known as Count Dracula.

An ode to a soldier who came to town, fell in love, then began making his own sparkling wine.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

Fragments of architectural wonders from around the globe are embedded in the newspaper building's walls.

Ralph Waldo Emerson spent two years living here decades before it became a Frederick Law Olmsted-designed park.