Here's how to sleep with six million souls in the Paris Catacombs this Halloween...
Airbnb's House of horrors
Airbnb is offering travellers the chance to spend Halloween night in the depths of Paris's skull-and-bone-strewn catacombs.
"Bienvenue to the bowels of Paris!" the home rental site screams.
"Escape the pint-sized pirates and mini goblins in the world’s largest grave— Paris’ famous catacombs, the final resting place of six million souls!"
Members who wish to spend the night in the ossuary, must tell the host "why you think you're brave enough" before midnight tonight, October 20.
The prize is free and includes a real bed and breakfast, but unsurprisingly, mod-cons like Wi-Fi, cable TV and washers/driers are not on offer.
Guests are also promised "a dazzling culinary experience while enjoying a private concert in the most incredible acoustics under the earth", however.
There's also a spooky story before bedtime.
"A storyteller will have you spellbound with fascinating tales from the catacombs, guaranteed to produce nightmares," Airbnb says.
"Finally, enjoy dawn with the dead, as you become the only living person ever to wake up in the Paris catacombs."
The California-based company reportedly paid up to €350,000 to privatise the space for its publicity stunt, sources told AFP.
The listing is the latest in a long line of one-offs designed to capture media and public attention. Others have offered guests the chance to sleep at an IKEA in Sydney, and in a "pimped out" KLM jet in Amsterdam.
See the full listing at airbnb.ie/night-at/paris-catacombs.
Set 20 metres beneath the streets of Paris, the catacombs are stuffed with the skulls and bones of some 6,000,000 people. Many of them were re-interred from the Cemetery of the Innocents in bone-laden carts draped in black veils.
Tours of the attraction take 45 minutes and cover approximately two kilometres underground - see paris.catacombs.fr for more.