Rock Wood is a 10.4-hectare (26-acre) biological Site of Special Scientific Interest north of Uckfield in East Sussex.

[1][2] This ancient wood has several different types of broadleaved woodland, a stream which cuts through a steep sided valley and a small waterfall.

The valley has a moist and mild climate which provides a suitable habitat for mosses and liverworts which are uncommon in south-east England.

[3]