Integrated into the city park in Mainz's Oberstadt district are an aviary and a flamingo pond. Both facilities were built in 1960 with a total size of 1,500 m² and have been a magnet for park visitors ever since.

The aviary is home to zebra finches, rice finches, canaries, silver-billed finches, and diamond doves. The main attraction of the aviary is a pair of yellow-breasted macaws. The aviary is partially glassed-in and features several outdoor aviaries. Visitors can walk through the aviary, allowing them to observe the animals from the inside as well. About 10 bird species and roughly 100 birds live in the old aviaries at the entrance to the public park.

The Flamingo Pond consists of a large pond area, a feeding area, and the flamingo house.

Right next to the aviary is the rose garden, which is also of interest to visitors.