Luna’s crowning glory is the incredible Dupag Rock Formation within Marag Valley. Its maze-like cluster of spiked limestone is a popular clambering destination among tourists. Not far off is the 700m-long, crystal-clear Manacota Underground River. It traverses an underground cave system and can go as deep as 40 feet. A 20-minute drive away from Marag Valley is the enchanting Lussok Underground River and Cave. Vines and large ferns frame the gaping entrance to the cavern. Inside, glimmering limestone formations reflect the light seeping from the holes or lussok From here, you can go on a one-hour guided spelunking activity up its vertical cave.