Sun, 6 Sep 2026 in Maastricht

Explore the historic Sint Pieter Quarry at Fort Sint Pieter in Maastricht on Open Monuments Day.

Guided scooter adventure through the Zonneberg Caves, a dark underground network in Sint-Pietersberg, equipped with just a headlamp.

Discover Maastricht comfortably from the Zonnetrein, a scenic tour through this diverse city.

Also running

Multi-day exhibitions and festivals still on today.

Visit both the historic Fort Sint Pieter and the Sint-Pietersberg caves in one combination ticket.

Free access to climb the iconic museum tower at Bonnefanten with panoramic views across Maastricht.