Selangor
Selangor actually describes Malaysia's most developed and populated state that leads up to Kuala Lumpur's urban sprawl. Here you'll find a Formula One racetrack, the National Zoo of Malaysia, and enormous theme parks including an indoor snow park.
Selangor is busy and booming; shopping malls sprawl as far as the eye can see. When you can't possibly shop anymore, head to the nearby Genting Highlands -- Malaysia's version of Vegas perched on top of a mountain. The First World Hotel was once the world's largest hotel with 6,118 rooms and a theme park.
But Selangor isn't just about LEDs and concrete: The famous Batu Caves are a Hindu shrine and draw large crowds, as do the abundance of fireflies along the river in Kuala Selangor.