Gua Kelam Recreational Park is an interesting cave with limestone formations, fossils, and cave bats. Also known as the Cave of Darkness, this cave is well-known for its cave walk. A wooden hanging bridge connects Kaki Bukit to the opposite end of the cave, Wan Tangga Valley. Outside the cave, take notice of cooking and storage area traces left behind during the mining era. Apart from caving activities, one can enjoy camping, picnic, and birdwatching at this park.