Bonn Botanic Gardens (Botanischer Garten Bonn), covering some 16 acres and owned and operated by the University of Bonn, can trace its roots back as far as 1340 when constructed as part of a castle gardens.

 They were transformed in their current Baroque style in 1720, and the Rococo Poppelsdorf Palace was added in 1746. These days the garden is home to more than 11,000 species of plants, including many endangered local species. 

Highlights of its outdoor gardens include numerous species of woody plants in the large arboretum, as well as plants arranged by geographic region.