The Gouliot Headland is a RAMSAR site (it gained this status on 9^th April 2007), recognised worldwide as a Wetland of International importance under the International Ramsar Convention. This recognises and protects the thriving wealth of species of this special Marine environment. The Gouliot Caves, a large sea cave system on the Sark side of the Gouliot passage.

Gouliot caves lie to the right of the small headland which is directly opposite Brecqhou and the Gouliot passage. The cave passes through the headland.

The cave is rich in a variety of invertebrate life, containing many endangered species such as sponges, sea anemones and hybroids (a type of vascular cell and a life stage for most hydrozoa animals who are related to jellyfish and corals). It is a mosaic of many colours.

The headland above the caves supports a range of coastal ecosystems including coastal grassland and hard rock. These habitats are home to many rare and endangered species of plants, insects and lichens.