Petronas Twin Towers•Petronas towers are located in Jalan Ampang, Kuala Lumpur, Malaysia. •The Twin Towers were built on the site of Kuala Lumpur's race track.•Designed by Argentine-American architect César Pelli and built by Bachy Soletanche at a cost of US $1.2 billion, the Twin Towers were the tallest buildings in the world until 2004, when Taipei 101 took over the title. However, Petronas Towers are still the tallest twin buildings.•Planning on the Petronas Towers started on 1 January 1992 and included rigorous tests and simulations of wind and structural loads on the design.•The concrete raft foundation, comprising 13,200 cubic metres (470,000 cu ft) of concrete was continuously poured through a period of 54 hours for each tower. The raft is 4.6 metres (15 ft) thick, weighs 32,500 tonnes (35,800 tons) and held the world record for the largest concrete pour until 2007.•Tower 1 ran into problems when they discovered the structure was leaning 25 millimetres (0.98 in) off from vertical. To correct the lean, the next 16 floors were slanted back 20 millimetres (0.79 in) with specialist surveyors hired to check verticality twice a day until the building's completion•The glass facade was designed to resemble Islamic art motifs.•The Towers measure 378m (1240ft) high, without the pinnacle and spread over an area of around 341,760 sq. m. (3.7 million sq. ft.). •On the top of each tower is a pinnacle standing 73.5 metres (241 ft) tall.•The sky-bridge of Petronas Twin Towers is at the 41st and 42nd levels, 58.4m (192ft) long and weighs 750 tons. •There are 10 escalators in each building. •The foundations go down as much as 120 m deep. •Interiors were completed on 1 January 1996, the spires of Tower 1 and Tower 2 were completed on 1 March 1996, and the first batch of 'PETRONAS’ personnel moved into the building on 1 January 1997. •The building was officially opened by the Prime Minister of Malaysia Tun Dr. Mahathir bin Mohamad on 1 August 1999.•The main occupant of the Petronas Towers is Petronas, the national oil-company of Malaysia. •There are 88 stories in Petronas Twin Towers. •Spanning 17 acres (6.9 ha) below the building is the KLCC park with jogging and walking paths, a fountain with incorporates a light show, wading pools, and a children's playground.•Below Petronas Twin Towers is a shopping mall, Suria KLCC, and Dewan Filharmonik Petronas, the home of the Malaysian Philharmonic Orchestra. •Only a limited number of timed tickets are provided on a daily basis to tour the buildings. •The climax of the 1999 film Entrapment was filmed at the skybridge•Several scenes of the popular Bollywood film Don: The Chase Begins Again were filmed in the Towers and its skybridge•On 15 April 1999, Felix Baumgartner set the world record for BASE jumping (since broken) by jumping off a window cleaning crane.•Thousands of people were evacuated on 12 September 2001 after a bomb threat the day after the September 11 attacks destroyed the World Trade Center towers in New York City. •In the video game Hitman 2: Silent Assassin, Basement Killing, The Graveyard Shift, & The Jacuzzi Job all take place in the Petronas Towers•In 2009, French urban climber Alain "Spiderman" Robert, using only his bare hands and feet and with no safety devices, scaled to the top of Tower Two in just under 2 hours after two previous efforts had ended in arrest. •The Petronas Towers feature a diamond-faceted facade consisting of 83,500 square metres (899,000 sq ft) of stainless steel extrusions. In addition, a 33,000-panel curtain wall cladding system decorates the interiors of the towers.