<p><br> Catch sweeping views of <a href="http://travel.nationalgeographic.com/travel/city-guides/chicago-illinois/">Chicago</a>'s skyline from the 103rd-floor Skydeck on the Willis Tower (formerly the Sears Tower), tallest building in the Western Hemisphere at 1,450 feet. "Chicago's architecture is breathtaking, literally," says James Conaway, author of "<a href="http://travel.nationalgeographic.com/travel/city-guides/chicago-green">Chicago: American's Green City</a>," a feature story in the September 2010 issue of <i>National Geographic Traveler.</i></p>

Skydeck


Catch sweeping views of Chicago's skyline from the 103rd-floor Skydeck on the Willis Tower (formerly the Sears Tower), tallest building in the Western Hemisphere at 1,450 feet. "Chicago's architecture is breathtaking, literally," says James Conaway, author of "Chicago: American's Green City," a feature story in the September 2010 issue of National Geographic Traveler.

Photograph by Melissa Farlow

Green Chicago

Photo Gallery: Chicago

Read This Next

What drives elephant poaching? It’s not greed
How old are you, really? The answer is written on your face.
The rise of vegan safaris

Go Further

Subscriber Exclusive Content

Why are people so dang obsessed with Mars?

How viruses shape our world

The era of greyhound racing in the U.S. is coming to an end

See how people have imagined life on Mars through history

See how NASA’s new Mars rover will explore the red planet

Why are people so dang obsessed with Mars?

How viruses shape our world

The era of greyhound racing in the U.S. is coming to an end

See how people have imagined life on Mars through history

See how NASA’s new Mars rover will explore the red planet

Why are people so dang obsessed with Mars?

How viruses shape our world

The era of greyhound racing in the U.S. is coming to an end

See how people have imagined life on Mars through history

See how NASA’s new Mars rover will explore the red planet