Find a shady space, strike up a conversation with some of the locals and enjoy the ambiance of Basic Rights Square. It's a lovely spot to take a break from all that sightseeing.
You'll soon discover why this Karlsruhe City Centre modern public area is popular with travelers. If you're searching for other things to see here, Karlsruhe Zoo, Karlsruhe Palace, and Karlsruhe Theater are in this area as well. They won't take very long to get to from Square of Fundamental Rights.