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.
Video The Hidden Roadway Under the George Washington Bridge The George Washington Bridge became the world's busiest motor-vehicle bridge by adding a second roadway beneath the one everyone sees.
Video The Skyscraper That Hangs Over an Art School Central Park Tower's most revealing detail is not just its height. It is the cantilever that lets the tower hang over the landmarked Art Students League to protect park views.
Video Why World Cup Fans Had to Pay $98 to Reach MetLife by Train MetLife Stadium was built for car crowds, but the World Cup turned NJ Transit into the front door of the stadium.
Video The Massive Oil Spill Still Sitting Under Greenpoint The Greenpoint oil spill was discovered from the air in 1978, but it had been accumulating underground beside Newtown Creek for decades.
Video New York's First Concrete Building Became a Tiny Landmark Beside Whole Foods The Coignet Stone Building was built as a concrete advertisement in 1873. More than 150 years later, it still sits apart from the city around it.
Video The Stepped Manhattan Building Designed to Keep Its Shadow Off the Park Mercedes House looks like a staircase because a straight tower beside DeWitt Clinton Park would have created a much harder approval fight.
Video The Brooklyn Bridge That Slides Sideways Across the Street The Carroll Street Bridge does not lift or swing. It rolls diagonally out of the way, a rare 1889 solution to the tight geometry of the Gowanus Canal.
Video The Beautiful Eggs That Digest New York's Sewage The Newtown Creek digester eggs turn sewage sludge into gas, heat, and fertilizer material, while doubling as one of Brooklyn's strangest landmarks.
Architecture The Brooklyn Towers That Twisted Open a View Eagle + West looks playful from the waterfront, but its strange rotated forms came from a serious urban problem: how to build tall without walling Greenpoint off from the river again.
Video Why New Yorkers Still Commute on a Ski Lift The Roosevelt Island Tram was supposed to be temporary, but a delayed subway, a dramatic rescue, and a full rebuild turned it into a permanent New York commute.