Day trip to the Genting Highlands for a cable car ride and casino/theme park

Watch sunset from the Heli Lounge Bar rooftop (on an actual helipad)

Explore Batu Caves — 272 rainbow steps up to a Hindu temple cave (free entry, 30 min by KTM train)

Explore the Islamic Arts Museum (RM 14 / $3)

Eat through Jalan Alor night food market in Bukit Bintang