A full-day expedition (about two hours by boat from Siargao) into a labyrinth of limestone lagoons, glowing caves and hidden lakes on Bucas Grande Island. Small paddle boats thread through Hagukan and Magkukuob caves, and in season you can swim among thousands of harmless stingless jellyfish in the sanctuary lake.
A 30–45 minute bangka ride through the Philippines' largest mangrove forest ends at a jade-green lagoon walled in by jungle-covered limestone hills. The floating pontoon has a wooden diving board, and paddling a SUP or transparent kayak across the glassy water is the signature Siargao postcard moment.
A dedicated freediving school and hostel in General Luna that has quietly become one of the island's best-reviewed activity operators. Coaches Jen and Dale specialise in talking nervous first-timers through breathwork on land before guiding them down the line in Siargao's warm, clear water, with courses running from intro sessions to AIDA certifications.
Siargao's longest-running international dive operation, teaching the full PADI ladder and AIDA freediving courses in four languages from its General Luna base with a training pool and its own boat. Twice-daily fun dives visit sites from the shallow coral gardens of Secret Garden to the drop-offs of Blue Cathedral on the Pacific side.
The island's main kite school, operating from the beachfront of Bravo Beach Resort on Tourism Road with IKO-style progression from kite control through waterstart to wave riding. The shallow lagoon in front makes a forgiving classroom, and the school teaches ages '7 to 77' with rental and storage for travelling kiters.