The castle park, built in the years 1817 to 1823, in the style of an English landscape garden and since 1929 the scene of the "International Wiesbaden Whitsun tournament", is protected as a garden monument and is at the same time open to the public. In the park is the Mosburg.
The Biebricher Castle has a bistro café with a large outdoor terrace, from which you can enjoy a beautiful view of the Rhine.