Visit Batu Caves where you can learn about local culture and Hindu traditions. The Hindu temple is located inside the caves. Expect to get sweaty and a good workout. You will need to walk up 272 steps if you want to see the temple!
The caves are guarded by a 42m-tall gold statue of Lord Murugan.
Be careful with food (even in your backpack). The monkeys here are not shy and will take any food they get their eyes on.
Once at the top of the steps, enjoy the view of the Kuala Lumpur skyline.