Burj Khalifa which was previously known as Burj Dubai is the tallest structure or skyscraper in the world. Located in Dubai, United Arab Emirates, the structure has a total height of 829.8 meters.Burj Dubai was renamed Burj Khalifa, to honour the UAE President Khalifa bin Zayed Al Nahyan for his crucial support. It gained its record when the structure gets completed on 1 October 2009 (started on September 2004). Before that, the record was with Taipei 101 located in Xinyi District, Taipei, Taiwan. To diversify from an oil-based economy to one that is service and tourism based and gaining international recognition was the motive of the government behind the decision to build the building.

Samsung C&T from South Korea constructed the tower. They also did the work on the Petronas Twin Towers and Taipei 101. They built the tower in partnership with Besix from Belgium and Arabtec from UAE. Burj Khalifa was designed to be used as a large-scale, mixed-use development site that would include the Dubai Mall, at least 19 residential towers, nine hotels (Downtown Dubai is one of them), 30,000 homes, 3 hectares of parkland and the 12-hectare artificial Burj Khalifa Lake. The floor area is 309,473 m² (for complete details the information is at : http://buildingdb.ctbuh.org/?do=building&building_id=3). Jacqui Josephson, a tourism and VIP delegations executive at Nakheel Properties said that "He (Sheikh Mohammed bin Rashid Al Maktoum) wanted to put Dubai on the map with something really sensational," (Nakheel properties operates under the umbrella of Dubai World, which manages various businesses on behalf of the Dubai government.)

Adrian Smith, the architect who designed it, sought and received approval to increase its current height as he felt that the uppermost section of the building did not culminate elegantly with the rest of the structure. He will attempt to make the crown slender and this change does not include any added floors to the building. The cleaning of the building's top 27 additional tiers and the glass spire will be done by unmanned machines. A$8million was the cost of the cleaning system which was developed in Melbourne.

Burj Khalifa was honored as first recipient of CTBUH’’s new Tall Building "Global Icon" Award at its annual "Best Tall Buildings Awards Ceremony" on 25 October 2010. There are many records associated with Burj Khalifa. Few of them are
Tallest existing structure at 829.8 m.
Tallest structure ever built.
Building with most floors with 163 floors.
World's highest elevator installation, situated inside a rod at the very top of the building.
Highest vertical concrete pumping (for a building): 606 m.
World's highest nightclub at 144th floor.
World's highest New Year display of fireworks..
World's second highest swimmingpool at 76th floor.