Located adjacent to the entrance of the gardens is the Sir Thomas Brisbane Planetarium, which incorporates the Cosmic Skydome.

Also located at the gardens is the Mount Coot-tha Library operated by Brisbane City Council.

[4] Unlike most public libraries in Brisbane which have general collections, this library holds a specialist collection about botany and astronomy and related topics, reflecting its location within the botanic garden and the Brisbane Planetarium also on the site.

The National Australia Remembers Freedom Wall in Brisbane Botanic Gardens Mt Coot-tha is a space meant for quiet contemplation and reflection on the Sacrifice of the Generation who fought for the "Freedom" we enjoy today.

A commemorative dedication plaque from Brisbane City Council and the Japan Association for the 1988 Leisure Exposition and a welcome gate with calligraphy on a dedication tablet above the gate by then Prime Minister of Japan Noboru Takeshita greets visitors to the Garden at the entrance to the Garden.

It is more than 100 years old and is used to "provide running water needed in the purification ritual that occurs before the tea ceremony".