We noticed that you're using an unsupported browser. The TripAdvisor website may not display properly. We support the following browsers:
Owner description: Are you looking for an unforgettable and unique experience? Descend into the marl caves of Valkenburg and discover the unknown!
Underground experiences: ASP Adventure organizes active and challenging activities for individulas and groups in the largest underground marl galleries of Europe. Descend into the dark depths, move towards the flickering candlelight and experience the exceptional stories that have been hidden underground. Follow the guide into the mysterious pale-yellow marlstone corridors by cave bike or on foot. Join us on this journey and discover an unknown world.
Outdoor activities: There's also plenty to discover above ground. The hilly landscape of Limburg - with its beautiful nature and rich historical past - offers the perfect scenery for original experiences for groups and teams of all types and sizes; on foot, by mountain bike or on groundbreaking heights...