Traveler's tip

Aquaria:

A gigantic aquarium housing 5,000 varieties of tropical fishes, Aquaria has an underwater tunnel, various exhibits of flora and fauna, and multimedia kiosks.
Petrosains: A museum of the science and technology behind the petroleum industry, located in the Petronas Towers. A great place to bring kids, but it shouldn't be too high on the agenda for older folks.

KL Tower:

1,100 feet above ground, the observation deck on the top floor provides great city views, and you'll actually be a few dozen feet higher than the Petronas Towers since the tower is built on a hill.

Traveler's tip:

The views from the KL Tower are far superior to those from the Petronas Towers, though KL Tower is not a particularly easy place to reach by public transport.