Unveiling Maastricht Underground. This afternoon, prepare to journey into the depths of Maastricht’s best kept secret, the mysterious Maastricht Underground. Hidden beneath the surface lies a world of intrigue and wonder, waiting patiently to be discovered. We toured the fascinating underground caves of Maastricht, a labyrinth of over 20,000 passageways first excavated by the Romans. We almost chose not to do this tour because we weren’t sure what to expect, and were afraid it might be a boring old tour. I can’t tell you how glad I am that we opted in…. Read More