Add to favorites list

🌲 A concentration of nature activities at reduced prices

Located at Saint-Julien-des-Landes in Vendée, The Grand Défi is the nature leisure park for the whole family! It is also one of the largest multi-activity parks in Vendée, just 10 minutes from Pays des Achards. Treetop adventure park, paintball, galactic laser, aquapark… it's the perfect spot to have fun with family or friends, surrounded by nature.
And good news: by going through the Tourist Office, you benefit from low rates on all park activities!

Unmissable amusement park Pays des Achards, plan at least half a day to enjoy the activities on site and the surrounding setting. When you are told for the whole family, that's really it! At the Grand Défi, certain activities can be practiced from the age of 2 ! Your little one will no longer know where to turn between tree climbing, treasure hunts, the mini-farm and pony rides.

Our privilege rates

You made the choice to go there and you will not regret it. But above all, go through the “Tourist Office” box to enjoy a 5% DISCOUNT on every ticket*! The offer is valid for all activities.

Several options are available to you:

Tarifs préférentiels Grand Défi 2025

Here one of the 10 good reasons to come see us at the Tourist Office!

📍 Practical information

  • The Grand Défi is located in Saint-Julien-des-Landes, less than 10 minutes from Les Achards.
  • The park is open from April to November (see the calendar on the official website).
  • Tickets purchased at the Office are undated (except for the Explor'Game and the pony ride) and valid for two seasons.

🛒 Where to buy your tickets?

3 easy ways to book:


🎁 Want to give it as a gift? It's possible!

The Great Challenge is also one of the experiences included in the Vendée “Emotion” Gift Box", offered at €85. A great gift idea for a birthday, Christmas, or simply to please the whole family.

💥 The box includes a complete multi-activity package (tree climbing, paintball, galactic laser, quick jump, disc golf, etc.) for 4 people, to experience in the heart of the largest treetop adventure park in the world, here in Saint-Julien-des-Landes.

This box is valid for one year and can be purchased directly at the Tourist Office, on site or by telephone.


🧭 What if you extended the adventure in Vendée?

In addition to your tickets for Le Grand Défi, the Pays des Achards Tourist Office offers you other discounted outings to fully enjoy your stay between land, sea and large-scale shows.

(I.e. Puy du Fou in Vendée
Book your day tickets for this iconic Vendée theme park. Historical shows, immersive scenery, and thrills guaranteed for the whole family.

⛴️ Crossings to the Isle of Yeu
From Fromentine or Saint-Gilles-Croix-de-Vie, set off to discover this wild and unspoiled island, with reduced-price crossings available at the Tourist Office.

???? Leisure parks, gardens and animal sites
Zoos, aquarium, adventure castle, botanical garden… so many activities accessible at smart prices, all less than an hour from Les Achards.