On the high point of the first, Edburton Hill, are the earthworks of a motte-and-bailey castle, which in spring and early summer are a knee-high wildflower meadow: agrimony, wild mignonette, red clover, yellow rattle, marjoram, scabious, knapweed and the odd tall bolt of fireweed, through all of which wander string-like stems of bindweed.