Tunnel under the Ganzenmarkt
The tunnel between the Ganzenmarkt and the Oudegracht has been around since the Middle Ages. Goods were brought from the Ganzenmarkt to the Oudegracht via this route. Today the tunnel is the gateway to the catering industry on the Oudegracht.
During the day the tunnel does not look too special, but in the evening when it gets dark, the tunnel shows all the colors of the rainbow. The idea of this was designed by Erik Groen.
Very nice to walk through and take cool pictures in the different lights :)