You can practically hear the bright ideas whirring around this light- flooded co-working space, where furniture comes apart like Lego bricks so it can accommodate regular workshops and events. The community-minded company offers big discounts to businesses with a positive social impact.

Europe's most extensive collection of pop art, the third-largest Picasso collection in the world and some of the most important works by German expressionists can all be found under this rippling roof. Don't miss the unusual views of Cologne Cathedral from its sunny terrace.

With mind-boggling structures, sound installations, sculptures that look like trees and trees that look like sculptures, this small park is great if you want to be immersed in art but are short on time. Visit in the late afternoon to enjoy shadows almost as striking as the works themselves.

What impact do video games have on human health and our view of the world? That is the question researchers grapple with in this futuristic lab on the top floor of the University of Applied Sciences. It also offers BAs and MAs in game design - talk about dream-job potential.