Originally laid out in 1939 as part of a major horticultural show, Killesberg Park is a lovely 123-acre open space offering visitors several things to do. 

Many of its structures date back to its opening and are still used for flower shows and events, but the most recent attraction is the unusual Killesberg Tower. 

This 40-meter-tall cone-shaped observation tower is made of metal stairs that spiral upwards on steel cables. Its open-air construction can be a bit unnerving, as can the slight swaying feeling on the uppermost of the observation platforms.