The Paris Catacombs, first opened in 1809, form a vast underground ossuary 20 m beneath Place Denfert‑Rochereau in former limestone quarries. They contain the remains of over six million Parisians, transferred after cemetery overcrowding and the collapse of the Innocents’ Cemetery at the end of the 18ᵗʰ century.

The one-way, 1.5 km tour begins with 131 steps down, passes through narrow, dimly lit tunnels, and climbs 112 steps to exit at 21 bis Avenue René‑Coty. A constant 14 °C and humid climate calls for warm clothing and sturdy footwear.

Visitors explore walls of bones artistically stacked in geometric patterns, discover inscriptions and carvings by quarrymen like Decuré, and see curiosities such as the “Samaritan Fountain,” once home to fish. A chilling anecdote: some skulls have mysteriously disappeared over the years, taken as souvenirs by early visitors.

This immersive experience attracts a diverse audience—history buffs, thrill seekers, art and architecture students, and families with teens. Special guided tours are held occasionally (First Empire themes, nighttime visits, Heritage Days).

Practical info:

Open Tuesday–Sunday, 9:45 am–8:30 pm (last entry 7:30 pm), closed Mondays, Jan 1, May 1, Dec 25, but open on certain holidays.

Online booking strongly advised up to 7 days ahead; site capacity capped at 200 visitors at a time.

Prohibited items: large bags, suitcases, strollers, food, alcoholic beverages; non-flash photography allowed with courtesy.

Accessibility is limited: not suitable for wheelchairs, mobility-impaired, claustrophobic, heart or respiratory sufferers; guide dogs are allowed.

Highlights include a journey beneath Paris in haunting ambiance, historical and artistic insights, and multilingual audio guides. Expect one hour, wear appropriate attire, and allow for potential queues.