9. Batu Cave, Malaysia
A limestone hill housing series of stunning caves and temples within, Batu Cave in Selangor, Malaysia is believed to be 400 million years old. A revered religious spot for Hindus, Batu cave is also a popular site with rock climbers. There are more than 160 climbing routes scattered all around the vicinity of the caves. If you are seeking adventure, explore the Dark Cave, just below the Temple Cave, where the rock formations and stalagmites rising from the floor and Stalactites jutting from the ceiling of the cave are so intricate that you will be spellbound. An enthralling amalgamation of religion with adventure, Batu Caves is a must-visit for any nature lover.