The world's most mysterious buildings

Story highlights

  • These peculiar buildings are mysterious beyond ghost stories, legends and fables
  • From prehistoric secrets to anonymous patrons, these places intrigue
  • Architecture can be as haunting as the lingering aura of tragic history
  • See the buildings in the United States, Mexico, Denmark, among others
Mysteries come in many forms: ancient, modern, unsolved and unexplained. But the world's most mysterious buildings are a physical force to be reckoned with.
They've become popularized on websites such as, and the granddaddy of them all,, an exhaustive user-generated and editor-curated database of the unusual.
Our list of mysteries doesn't trot out cliched write-ups of the Bermuda Triangle and the Egyptian pyramids, nor is it promoting the usual suspects of PR-pushed haunted hotels. These peculiar structures are original, lesser-known and often arcane.
Mystery, after all, must be authentic.
"In an age where it sometimes seems like there's nothing left to discover, our site is for people who still believe in exploration," says Atlas Obscura co-founder Joshua Foer, whose own favorite mysterious buildings include a murder mansion in Los Angeles and an art house in Centralia, Washington.
Our definition of mysterious is broad and varied. Some buildings on our list are being eaten alive by the Earth, such as a sand-swallowed lighthouse in Denmark's Jutland and a lava-buried church in the remote highlands of Mexico. Others have design elements that seem to defy logic or were mysteriously abandoned by their people centuries ago. New York's shadowy Renwick Smallpox Hospital has more recent traces of human life -- and an eerie energy that lingers. We've got the photo proof.
Renwick Hospital, Roosevelt Island, New York City
This abandoned Smallpox Hospital, replete with granite veneer, corbelled parapets and mansard roofs, is a reminder of Gotham's grisly past. Its 100 hospital beds once hosted quarantined immigrants suffering from the gruesome disease. A $4.5 million restoration project will open Renwick to the public in 2013, kicking off with an art project that includes giant butterflies hovering over the site.
Mystery: Renwick is illuminated at night by an anonymous patron, who purportedly has a view of it from an Upper East Side penthouse.
Visit: The American Institute of Architects and Classic Har