All Explore Maastricht guided tours have been cancelled until 31 May. This is in response to the decisions taken by the Dutch Government to combat the spread of COVID-19. We fully support this move, which is in the best interests of the health of our society. We hope to be able to welcome you again in better times.

Away from the crowds... dark and mysterious... these are the caves, the fort, and the Kazematten tunnels. They are quite literally the foundations of Maastricht. 

Underground, time stands still and the online world doesn't exist. Visit the most secret part of the city with an Official Maastricht Guide. The extensive underground tunnel system will amaze you while the stories and anecdotes told by our Official Maastricht Guides bring history back to life. In a whirl of stories, they take you back to times of foreign occupation, sieges, and people forced to hide underground.