Source: http://www.kommt-amkarlsplatz.com.License: All Rights Reserved.

In spring, something will come to the Karlsplatz in Vienna. If you want to find out what it is, you can sign up on this secretive website.

Source: http://www.kommt-amkarlsplatz.com.License: All Rights Reserved.

Source: http://www.kommt-amkarlsplatz.com.License: All Rights Reserved.