What's on the rooftops of Chicago's most famous skyscrapers?

When Chicago built the Tallest Building in the World | The story of Sears Tower

Chicago USA: Why It's a Must-Visit

Chicago's Forgotten Lake Tunnels, Cribs, and Waterworks - IT'S HISTORY

How 5 Bridges Transformed New York City | Architectural Digest

How We Rank Skyscrapers is Absurd

What's on the rooftops of New York's most famous skyscrapers? - IT'S HISTORY

Abandoned - Chicago Spire

Addition to the West Antenna Tower. Sears Building, Chicago, Illinois. Sunday, June 4th 2000

What's on the rooftops of famous Texan buildings?

Why New York's Skyscrapers Keep Changing Shape

Architect Explores Chicago's Hidden Architecture & History | Walking Tour | Architectural Digest

Building the World’s Second Tallest Skyscraper

The Story of Chicago: Crossroads of America

How Chicago Built an Amazing Lake Shore

The Incredible Story Of The 1893 World's Fair

Chicago’s Waterfront Will Never Be the Same

Why Chicago Razed The First Skyscraper | The Field Building

Magnificent Three: Cities that Shaped History

Why the Brooklyn Bridge used Elephants to Prove its Safety - IT'S HISTORY

Chicago's FORGOTTEN "L" Lines- The History of Chicago Elevated Trains - IT'S HISTORY