A cafe located in White Rock. The premises have extensive tunnels through the sandstone at the rear which feature a number of carvings. These tunnels were utilised at various times as Air Raid Shelters, a nightclub and nowadays storage.
During 2011, one of the caverns was discovered to have been used for cultivating cannabis; police uncovering plants worth an estimated £1 million. Although the plants and much of the equipment was seized and destroyed by the police, as late as 2021 urban explorers reported that much of the illegal operation's equipment was still in-place.
Access to these tunnels was gained illegally by some urban explorers in 2019 and images together with a video were uploaded (however access is impossible without permission). 
References & Notes
- Hastings and St. Leonards Observer: Group’s mission to discover hidden Hastings - Hastings and St. Leonards Observer, accessdate: 17 January 2020