Halloween is shaping up to be a tough one in Yvelines (78)! On Saturday, October 25, 2025, the Parc de la Boucle de Montesson becomes the setting for a zombie run-style murder party . As night falls, you take on the role of apprentice scientists trapped in an experiment gone wrong. In just one hour, you'll solve riddles, outrun the undead and try to save your own skin... An evening that promises XXL thrills!
Forbidden to under-15s, this immersive experience plunges you into a military and scientific base, where a super-soldier project has gone haywire. You're one of the new scientists expected to take part in the final phase of the test, which locks you in among hundreds of zombies, from whom you'll have to escape, while trying to find and complete the antidote in time, without getting caught!
Please note: only brave souls aged 15 and over will be accepted! All that's left for us to do is to wish you good luck on what promises to be... a deadly nocturnal adventure!
Halloween 2023 in the museums and châteaux of Paris and the Île-de-France region
Museums and châteaux are also celebrating Halloween! Workshops, special visits, games, costumes... A whole host of events await young and old alike this Halloween 2023! [Read more]
Dates and Opening Time
On October 25, 2025
Starts at 06:00 p.m.
Location
Boucle de Montesson Departmental Park
155 Avenue Gabriel Péri
78360 Montesson
Prices
€29
Recommended age
From 15 years old
Official website
www.mysteries-hunt.com
Booking
www.mysteries-hunt.com
Halloween 2023 in the museums and châteaux of Paris and the Île-de-France region
