AdrenalineLK Adventures runs scuba diving in five regions of Sri Lanka: Colombo, Unawatuna, Hikkaduwa, Trinco & Nilaveli, and Batticaloa & Pasikuda. Colombo is the operator's wreck-diving base, with luxury yacht dives to sites such as the SS Perseus, the Wallet Wreck, the Chief Dragon Car Wreck and the VIP Car Wreck, plus technical dives and a Discovery Dive program for beginners at the Thermopylae Sierra shipwreck. In Hikkaduwa the team dives the SS Conch and the Earl of Shaftesbury wrecks alongside coral reefs. PADI certification courses are offered from Open Water Diver through Rescue Diver, plus specialty courses including deep diving, Nitrox and wreck diving.