Tresilian Bay is a small cove of rock, boulders and some low tide sand, with a storm bank of pebbles at the back. This bank is home to plenty of driftwood and japanese knotweed. The coast path runs along the back of the beach with a large white house (Tresilian House) sitting in the small valley behind this. The cliffs are of the usual unstable mix of limestone and shales with caves on both sides of the bay. Reynard's Cave is the largest of these, and is on the west side. There are a few WW2 pill boxes situated alongside the coast path nearby. Parking is either at St Donats or Llantwit Major.