The University of Copenhagen Botanical Garden has an extensive complex of historical glasshouses dating from 1874. The most notable is the 3000-square metre conservatory complex from 1874. The Palm House at its centre is 16 metres tall and has narrow, cast-iron spiral stairs leading to a passageway at the top. Plants include a palm tree from 1824 and a fine collection of cycads, some of which are more than 100 years old.