One of the most remarkable peculiarities from Prague’s history is the Rudolph Gallery, in Czech “Rudolfova štola”, named after the emperor Rudolph II. It was built from 1581 to 1593 in order to feed water to the Royal Game Preserve, today Stromovka park. Over a length of roughly 1.1 km, the narrow tunnel bridges a decline of 110 cm.
It is a bit difficult after the 2002 floods to walk inside the tunnel. If you don’t want to do a virtual tour (this website is worth visiting also for the rare images of the bunkers below the former Stalin memorial and other subterranean spaces) you can still walk above the surface. Walking through the misty town is one of the few special things you can do here particularly in autumn, and hopefully the melancholy won’t kill you.