Next to the Sihlcity mall in Zurich, there is a highway that runs as a bridge above the Sihl river. There is a walking path and several reasons to draw a crowd. If you don’t look up, you will never notice the 100-yard track with a metal actual-sized briefcase suspended from it. The briefcase leaks water until it hits a watering station. Once the briefcase is filled back up, it begins to rotate around the track leaking water. 

This hidden art installation is the work of Roman Signer, a Swiss artist who often incorporates everyday objects such as umbrellas, tables, boots, hats, bicycles, and of course, briefcases, into his pieces.