Penn's Rocks

Penn's Rocks is a 10.2-hectare (25-acre) biological Site of Special Scientific Interest north of Crowborough in East Sussex.^[1][2]

Penn's Rocks

Site of Special Scientific Interest
Location	East Sussex
Grid reference	TQ 521 348[1]
Interest	Biological
Area	10.2 hectares (25 acres)[1]
Notification	1985[1]
Location map	Magic Map

This site is a steep sided valley on sandstone with many mosses and liverworts, which is a nationally rare habitat. Uncommon species include Orthodontium gracile, Bazzania trilobata, Saccogyna viticulosa and Harpanthus scutatus.^[3]

This site is in four separate areas. A footpath runs through one of them but the others are private land.