Devil's Dyke is a V-shaped, 100m deep valley located near Brighton in the South Downs of England. It is the longest, deepest and widest 'dry valley' in the UK, formed by melting permafrost water during the last ice age around 14,000 years ago. This location is shrouded in legend and is said to be the result of the Devil digging a trench to drown the parishioners of the Weald. The site offers panoramic views across Sussex and the sea, especially popular among paragliders and hang-gliders due to the updrafts created by its unique topography. Devil's Dyke has been a major tourist attraction since the Victorian era, featuring a now non-operational railway. It is part of the South Downs National Park and rich in chalk grassland flora and fauna, providing habitats for diverse species, including many types of butterflies and birds. It is a favourite among walkers, cyclists, and nature enthusiasts for the numerous paths, including the South Downs Way.