A giant scale model giving a sneak peek at what urban planners see for Shanghai by 2020.

The world's longest outdoor covered escalator system transports commuters through Hong Kong's hilly terrain.

Two cannon-like cranes were installed on top of the bank building to fend off bad feng shui.

The Roman city was the birthplace of various emperors and is home to one of the empire's most impressive architectural feats.

An eerie collection of the surviving structures from a past celebration of the future.

The world's largest wooden structure.

The final resting place of the great navigator, or maybe his brother.

Spain's largest bullring offers a unique glimpse at architecture and history.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

If you look closely at the oldest bridge in Paris, you might notice hundreds of ugly faces leering from its sides.

This demon atop the Notre-Dame de Paris looks utterly bored.

Now an entertainment complex, the Lingotto building was once an avant-garde auto factory with a test track on the roof.

The intricate geometry inside this Baroque-style dome was designed to create "terror of the human soul."

A Spanish-style estate that has traded black ties for rock concerts.

In terms of history and architecture, this is one of the most remarkable cemeteries in the world.

A focal point of the Cuban government, this city square features one of the most iconic images in the country.

Once a favorite playground for the world's most illustrious guests, Hotel Nacional's secret weapons and bunkers reveal a more menacing side to its golden history.

After the parade, students throw their beads on the tree hoping for good luck on exams.

This incredible collection of vintage pinball machines can be played at 25 cents a pop.

The tunnel's elegant proportions keep you snug with no claustrophobia freak-out.

A different kind of swan princess.

An unassuming corner inside downtown Orlando's library offers a whole new world of the park and its history.

This Garden District mansion was built to be bigger and grander than its original owner's former partner turned rival.

By day this New Orleans square is for pedestrians, but by night it is a kingdom of kittens.