Roosevelt Island in New York City is full of historical quirks, most notably its Pneumatic Trash System (AVAC). It is one of the only places in the U.S. where garbage is sucked through underground vacuum tubes to a central plant, meaning you won't see garbage trucks or smelly bags on the curbs. Historically, the island was once known as "Welfare Island" and "Blackwell's Island," serving as a site for prisons, almshouses, and the "Smallpox Hospital," the ruins of which are now a landmarked site. Another fun fact: the iconic Roosevelt Island Tramway was originally built in 1976 as a "temporary" solution while the subway was being finished, but it became so popular that it remained a permanent fixture. Today, it is also home to the "The Octagon," a luxury apartment building that was once the grand entrance to the New York City Municipal Lunatic Asylum, which was famously investigated by the undercover journalist Nellie Bly in 1887.