Petronas Twin Towers are the symbol of Malaysia's capital, Kuala Lumpur. They are the highest twin towers in the world; their altitude is 452m. Picturesque architecture along with really giant dimensions of the towers make these skyscrapers ones of the most impressive buildings on the planet.
It's curious but once upon a time the Americans disputed the pas of Petronas Towers, because their Chicago's skyscraper, Sears Tower, has the altitude of 527m. However, there are 75 meters of TV antennas of Sears Tower's altitude, which are on the roof. That is why, in accordance with the rules which are used in order to determine the highest building in the world, the commission didn't accepted these TV antennas as inseparable part of the construction, and Petronas' spires are seamless and inseparable element of the building.
If we forget that Petronas are the Twin Towers (the fact is they are two towers standing near and connected with the bridge between them), and take a look at the absolute altitude of the all skyscrapers in the world, then the priority among the buildings in exploitation is the following:
Burj Dubai - 828m Taipei 101 - 509m Shanghai World Financial Center - 492m Petronas Twin Towers - 452m
Right now you can see Petronas Towers from outside flying by helicopter closed to them, look inside them, be on the bridge between the Towers as well as observe them from the ground-level.