(Photo: Cesar I. Martins)
The catacombs beneath the streets of Paris were built there centuries ago to provide burial space for the residents of the crowded city. Six million people have been buried there and they'll be your hosts if you stay the night on Halloween.
Airbnb is offering to let 2 guests sleep (if you can sleep) among the piles of skeletons and graves on Halloween. You'll get an evening concert prior to a spooky bedtime story by a storyteller. In the morning, "you become the only living person ever to wake up in the Paris catacombs."
-via Altas Obscura