Under Maastricht are a labyrinth of man-made tunnels and caves, used for hiding from centuries of invasions.
Helpoort / Hell's Gate
Helpoort, Maastricht, LI 6211 HH, Netherlands
Part of the original city walls, dating back to the 13th Century.
Bosch Brewery
26 Wycker Grachtstraat, Maastricht, LI 6221 CX, Netherlands
Last complete city brewery of Maastricht. Beer has been brewed here since 1758, though we are unsure if it is still brewing... for a modern brewery, try Maltezer brewery