A 16 acre site set inside an abandoned chalk quarry on the Isle of Thanet in East Kent. Monkton Nature Reserve is managed by the Thanet Countryside Trust. There are over 350 species of flowering plant including 8 species of orchid. 25 species of butterfly have been recorded, and innumerable other species of insect, mammal and bird-life. The reserve is also home to the first artificial bat cave to be constructed in the UK.

There are two ponds inside the reserve, one of which is on the quarry floor and is a water-table pond with a fluctuating water level, while the other is a butyl-lined pond in a secluded location overlooked by a small bird hide. Both ponds are visited by grass snakes on hunting expeditions. Great Crested Newt even makes an appearance in one of our ponds. The water-table pond is used by a small number of the rare water vole.

There is a small young woodland in land above the quarry, and this is becoming well used by the bird population. Breeding numbers of Turtle Dove in this woodland have risen from one to five pairs over the last ten years.

A 1:1 scale replica of a Bronze Age Barrow has been constructed in the woodland. This is a long term experimental project to obtain data for the Thanet Archaeological Unit.

The quarry cliffs are of Late Cretaceous age (Santonian) and contain some good chalk fossils. Collecting can only be carried out with supervision. The cliffs act as home to a number of bird species including Jackdaw, a pair of Little Owls, and occasionally nesting Kestrels.

On-site is a well resourced Field Study Centre, which contains a number of different exhibitions, including a large geological collection. Fossils, rocks and minerals from the Mesozoic, Cainozoic, and Pleistocene are on display, including unusual items, including a fine specimen of a tooth palette from Cretaceous shark Ptychodus polygyrus.

The Thanet Observatory is situated in the centre of the nature reserve. It houses a 12" f5.89 reflecting telescope.