The River Wey (south branch), drains a little of the highest hill in Sussex, Black Down (or Blackdown) linked to Haslemere by the footpath and adjacent lane Tennyson's Lane, rising in six streams south and north-west of the town, which form small finger-like valleys. These unite to form a brook that follows the county boundary and another that follows the railway line, combining to form the river itself in a park in the west of the town. Despite these flows, much of the town, which sits close and high above these brooks, drains east into the basin of the Sussex river, the Arun the natural wooded headwaters of which have been recognised as part of the Surrey Hills AONB (Area of Outstanding Natural Beauty), and used for or kept as a series of natural attractions including the town's education museum, next to the town's main high street.