For the third year running Atlas Obscura has organized Obscura Day all over the world coming up on April 28th. We're throwing down from New York to New Zealand and have a bunch of events and adventures lined up, including a Retrofuture party in LA with BBC Future, special access to nuclear reactors and particle accelerators, off-limits and after dark tours of Alcatraz and Eastern State Penitentiary, magic libraries, rooftop camping, medical museums, sex museums, gun museums, the whole jam. Lots going on in NYC too! Over the past two years they've mobilized nearly 10k people to attend 200 events on every continent. This year should be no different.