📜 Historic castle ruins and underground labyrinth in Valkenburg.🔍 Dates back to the 11th century, with tunnels used as secret passages.# Why Go🏰 Explore medieval castle ruins and history🕵️ Discover secret tunnels, wall murals, and inscriptions in Velvet Cave🚶‍♀️ Journey through history, including WWII American soldier etchings🖼️ See impressive wall murals and inscriptions🎄 Visit the Christmas market (seasonal)🏞️ Enjoy panoramic views of Valkenburg from the ruins# Why Avoid⚠️ Velvet Cave by guided tour only🎄 Velvet Cave regular tours unavailable during Christmas Market (mid-November to late December)# Tips🎟️ Tickets for Castle Ruins available at entrance, Velvet Cave Christmas Market tickets also available.🗓️ Check website for varying open times, especially for guided tours.# Cost💰 Adults €10, age 4-11 €7.50, under 3 free.# Hours🕒 Castle ruins daily 10am-4:30pm (last admission 3:45pm). Velvet Cave guided tours generally 11am-4pm.# ClosedClosed on Christmas Day and January 1st.# Facilities🅿️ Parking available for cars🚻 Toilets available🍽️ Restaurant available, with rooftop bar