Run by Joni Bonifacio, Trexplore is the one-stop shop for Samar adventure tours. Caving, canyoning, trekking and mountain-biking trips are offered.

The Jiabong caves tour, near Catbalogan, is one of the Visayas' top one-day adventures. One-third of the six-hour tour, which ends with a pleasant 45-minute paddle in a dugout canoe, is spent swimming underground in full spelunking kit.

Tours of the huge Langun-Gobingob cave near Calbiga, 50km south of Catbalogan, include a night camping underground. It is thought to be the Philippines' largest karst system. The main cave, Langun-Gobingob, has a chamber the size of three football fields. Joni often discovers new caves and adds tours accordingly. Tours of Central cave involve five hours of walking (round-trip), an 18m rappel and four hours inside the cave, all on a gruelling day trip out of Catbalogan.

Canyoning tours include multitiered Bangon Falls near Catbalogan, Pinipisakan Falls and many locations in Biliran Island.

Give Joni at least a few days' notice before showing up. Costs start from P2500 per person for canyoning and from P3000 for caving, with discounts for larger groups. Rates include food, transport, equipment and photos taken during the day. Trexplore also has an attached shop which sells a range of quality outdoor clothing, shoes and equipment.