Cornerstone Dive Center is a PADI dive shop in Tulamben, a small fishing village on Bali's northeast coast famous for its diving. Its home dive site is the USAT Liberty wreck, a 120-metre WWII cargo ship that sank just 30 metres offshore in shallow water and is now covered in soft and hard corals and abundant marine life; the nearby Boga wreck and more than 30 other dive sites around Tulamben are also within easy reach, with Tulamben especially known for macro photography, night diving and gentle currents suited to all levels. The center offers PADI Scuba Diving, TecRec (technical diving) and Snorkelling courses plus EFR first-aid training, and equips divers with new gear including Apeks regulators; instructors are also experienced macro photographers happy to share tips. Facilities include an onsite training pool, classroom, retail shop, waterfront location, onsite accommodation and food & drinks, with staff speaking English and Mandarin. As a safety measure, the shop uses breathalyzers and asks guests not to dive if hungover.