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A sculptural high-rise with rippling balconies breaks the mold in Chicago; Mammoth machines bore 26 miles of tunnels for an underground railroad beneath London's city streets.

How Did They Build That?

Subways & Sightlines

Architects and engineers build an eco-friendly convention center on Vancouver's waterfront, a lift bridge in Bordeaux and a cocoon-shaped skyscraper in Tokyo each with unique challenges like marine habitats and massive spans.

Floating & Lifting

A 1.2-million-square-foot office building balances precariously on a 39-foot wide base in Chicago; a building named Pterodactyl lands on top of a Los Angeles parking garage; the world's longest suspension footbridge.

Heights & Balance

A dazzling new 1400 foot tapering skyscraper is built right next to New York's Grand Central. A curving wine museum requires ingenious engineering in Bordeaux, France. And possibly the world's most glamorous parking garage.

Parking & Sparkling

Challenges beset a sculptural new transportation hub for New York's World Trade Center; Amsterdam gains a building inspired by a mountain valley; a new launchpad for space travel prepares for liftoff in the New Mexico desert.

Fantastic & Futuristic

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Exploring the engineering and architectural masterpieces like The Copper in Manhattan to Gardens By the Bay in Singapore.

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