Consisting of 132 hectares and formally starting in 1759, Kew Gardens houses one of the largest and most diverse botanical and mycological collections in the world. It has many features which can be enjoyed on a visit including a treetop walkway, Sackler crossing, alpine house and what is said to be the ‘world’s most important surviving Victorian glass and iron structure,’ the Palm House.
Kew Gardens has its own police force, the Kew Constabulary, which has been operational since 1847. This force has two sergeants and twelve officers.