Brooklyn Bridge, New York (must see)

Seeking the most dramatic entrance into Manhattan?—The Brooklyn Bridge is the one. Stretching across the East River like a steel-wire tightrope for giants, this is one of New York’s most recognizable silhouettes since 1883—equal parts engineering flex and architectural poetry. The country took notice of it rather early, awarding the bridge the National Historic Landmark status in 1964, following which, civil engineers gave it their own stamp of admiration (as a National Historic Civil Engineering Landmark) in 1972.

The idea of linking Brooklyn and Manhattan had been floating around since the early 1800s, but it took the engineering duo—of John Augustus Roebling with the design, and his son Washington with the execution—to actually make it happen. Construction kicked off in 1869, and after fourteen ambitious, chaotic, and occasionally hazardous years, the bridge finally opened on May 24, 1883. President Chester A. Arthur even showed up for the ceremony, thus proving that ribbon-cuttings were the hot ticket long before Instagram...

Architecturally, the bridge is a hybrid marvel: part suspension bridge, part cable-stayed experiment, all held together by an orchestra of vertical and diagonal cables. Its stone towers, crowned with Neo-Gothic arches, rise from the river like a pair of cathedral doorways, guiding a roadway that stays well above passing ships thanks to long, raised viaducts.

The structure's numbers are just as solid. The main span clocks in at nearly 2,000 feet, the bridge itself expands and contracts by up to 16 inches, depending on the weather’s mood swings, and ships can glide under it with 127 feet of clearance to spare. Six trusses run beneath the roadway, while four enormous cables hold everything aloft—convincing evidence that 19th-century engineering was not messing around...

But the bridge saves its finest touch for people on foot. Eighteen feet above the cars is the elevated promenade, a wooden boardwalk divided down the middle, so cyclists and pedestrians can coexist in relative peace. Step onto it, and the city opens around you—skyline ahead, river below, and the gentle hum of New York all around. Indeed, it’s more than just a crossing, but a small, unforgettable performance...