About 500,000 people visit this place every year. However, would it be more challenging if you get the chance to spend a night inside the Catacombs in Paris?

The Paris Catacombs is a 300-kilometre stretch of skull-lined tunnels which is located 20 metres below street level. The walls are filled with lined up skulls and bones, some of which are from the 18th and 19th centuries. More or less, there are six million skulls in the said place.

The said six million residents include guillotine victims Princess Elisabeth of France and Maximilien Robespierre, architect of the French Revolution and the subsequent Reign of Terror. They have also become permanent homes to celebrities like Francois Rabelais, Jean de la Fontaine, Charles Perrault, Lavoisier, and Robespierre.  They also have royal visitors like Charles X, Francois 1er and Napoleon the 3rd. The rest of the bones are arranged in according to what cemetery they were from.

Home rental company Airbnb, as part of their Halloween promo, is giving away two brave souls the chance to stay a night at the world's largest grave - the Paris Catacombs. Winning this Halloween promo will give them the honour of 'being the first living people ever to do so'.

If you win this overnight stay, you will experience a private tour, a 'daunting culinary experience', and a storytelling time from a storyteller who has been preparing some unpleasant bedtime tales.

While there, remember one thing: Do not 'follow ghosts' through the tunnels as 'you might never find the exit.'

To make the tour to Paris Catacombs even more exciting and hair raising, mining engineer Louis-Etienne Hericart de Thury who was responsible for the renovations decided to add archway inscriptions, such as, 'Arrete, c'est ici l'empire de la mort!' ('Stop! This is the empire of death!').

A total of up to 350,000 euros ($400,000) has been paid to privatise the said place.

So, are you going to stay the night?