Head to the Gateway Arch Park Grounds to spend a lazy afternoon by the Mississippi River. The grounds are a part of the Gateway Arch which is also known as the Saint Louis Arch that was constructed in 1967. The grounds have a number of different plants in the Lewis and Clark Explorer's Garden where kids can discover numerous plant species. Families usually spend the afternoon under the warm sun relaxing or picnicking. You can also ride or cycle along the designated paths on the park grounds.

Website: archpark.org

Phone: (314) 881-2015

Cross Streets: Between Market St and Walnut St