Video The Twisting Towers That Turned Views Into Value One High Line's two towers twist away from each other to create more separation, better light, and more Hudson River views.
Architecture The Building That Helped Break Cooper Union's Free-Tuition Promise 41 Cooper Square was designed as a bold, green, world-class academic building. It also became tangled in the financial story that ended Cooper Union's century-and-a-half tuition-free tradition.
Video America's Tall Ship Was Built by Nazi Germany USCGC Eagle trains future Coast Guard officers under sail, but the ship began life as Horst Wessel, a German naval training vessel taken after World War II.
Video Google's Manhattan Groundscraper Built on a Freight Terminal St. John's Terminal gave Google something rare in Manhattan: enormous horizontal floors where a headquarters could grow out instead of up.
Video New York Cancer Hospital: The Castle at 455 Central Park West The New York Cancer Hospital looked like a French chateau because treating cancer in the 1880s required medicine, money, architecture, and persuasion.
Video Why Times Square Buildings Are Required to Wear Billboards Times Square's lights are not just advertising chaos. New York zoning requires major buildings in the district to carry large illuminated signs.
Video Air Conditioning Was Invented to Save a Brooklyn Print Job Willis Carrier's first modern air-conditioning system was not built for human comfort. It was built to stop humid Brooklyn air from ruining magazine printing.
Video The Nuclear-Missile Submarine You Can Walk Through in Manhattan USS Growler was built to hide nuclear cruise missiles at sea. Now the diesel-electric Cold War submarine sits in plain view beside the Intrepid Museum.
Video How San Antonio Turned a Deadly Flood Channel Into the River Walk The San Antonio River Walk began as a flood-control problem, survived a proposal to pave it over, and became one of Texas's most valuable urban places.
Video The Alamo Is Fighting to Recover the Battlefield Around It The Alamo's famous church survived, but much of the battlefield disappeared under downtown San Antonio. The current restoration is trying to tell the full site again.
Video The Manhattan Apartments Built Directly Over I-95 The Bridge Apartments turned air rights above the Trans-Manhattan Expressway into housing, then left residents living over one of New York's dirtiest traffic funnels.
Video The Useless Lighthouse That Children Saved From Scrap The Little Red Lighthouse lost its job when the George Washington Bridge opened above it, but a children's book gave it a second life.