here are some interesting facts about the towers - combined the towers have 1,000,000m2 of floor space; - at the 41st and 42nd level a skybridge connects the two towers 170m/558f above the ground. This bridge is 58.4m/192f long, weighs 750 tons and is open for the public since the end of 2000. The entrance is free (closed on Monday!), but only a limited amount of timed tickets (800) is given out each day. Chances are you will have to wait in line quite a while, before you get such a free ticket; and you're only allowed on the bridge for a mere 10 minutes. Worth it? Maybe, but instead a visit to the observatory of Menara Kuala Lumpur is much more interesting, though there is an entrance fee there (of RM15); - the towers have 32.000 windows; - the building costs were US $ 1,2 billion; - the towers were designed to symbolise strength and grace using geometric principles typified in Islamic architecture; - without pinnacle the buildings are 'only' 378m/1,240f tall; - the towers are part of the 100-acre KLCC Development. Other components of the development include the Suria KLCC, a six-story, 93,000 square feet shopping centre (with 270 specialty shops, cinema's and a food arcade), Menara Maxis, Menara Esso, the 20-hectare KLCC Park, a 6,000 capacity Surau, the District Cooling Centres to provide air conditioning and infrastructure works within the vicinity. The whole complex was built on a former horse-racing track; - the towers' complex includes an art gallery, an 840-seat concert hall, and an underground parking lot; the main occupant of the buildings is Petronas, the national oil-company; - though completed in 1998, the buildings were officially opened on August 28th, 1999; - each tower contains 80,000 m3 of concrete in strengths up to Grade 80, almost 11,000 tonnes of reinforcement, and 7,500 tonnes of structural steel beams and trusses. - when standing in front of the building and looking towards the entrance, like seen on the picture above on the left (kl015), tower 2 is the building on the left, and tower 1 is the building on the right.