Looking up at the 88 floors of the PETRONAS Twin Towers in Kuala Lumpur is awesome. Each tower was the world’s tallest from 1996 until 2004. Menara Berkembar Petronas are still the biggest twin skyscrapers at 1,483 feet with the deepest foundations at 374 feet. The price tag was equally impressive: $1.6 billion. In the center is the Skybridge on the 41st and 42nd floor. If this 558 foot observation deck is not high enough for you, then double down by going up to the 86th floor. The namesake is PETRONAS, an oil and gas company founded in Malaysia and headquartered in Tower One.