One of the most distinctive caves in Malaysia is a 370-metre long limestone cave near the small town of Kaki Bukit (literally 'foot hill') called Gua Kelam (Cave of Darkness). Located about 33km north of Kangar, the state capital, Gua Kelam Recreational Park is popular for its enchanting 'cave walk' where you can enter from one end of the cave and come out a different end. Gua Kelam is located within the Perlis State Park which borders with the Nakawan Range of Thailand.

The only path in is via a suspension wooden bridge made of an eight-feet wide wooden walkway. This bridge links Kaki Bukit to the Wan Tangga Valley, a valley on the opposite end of Gua Kelam. Back in 1935, an Englishman saw the water pathway as a brilliant method of transporting tin ore from a mine located near the stream entrance through the underground cavern to Kaki Bukit. 

Now, only locals and tourists make their way through the cave via a brightly illuminated wooden walkway inside the cave. You can still find remnants of the tin mine operation inside. As you make your way through the cave, the sound of a swirling dark subterranean stream below reverberates forming a concerto with the squeaking bats and dripping water from the stalactites. It may sound a bit spooky, after all this was once the home of Stone Age men.