World's tallest buildings

Ever since a challenge to climb the talest buildings. I’ve been keen to find out exactly what are the highest buildings in the world, and have set an objective to climb them all.

Below is the list of tallest building, based on the height of the topmost climbable floor:

1st: Burj-Dubai

In at number one in the list of the highest buildings in the world is the Burj-Dubai. Although it is not quite completed it already boasts a height exceeding 705m, almost 200m higher than the previous record holder.
Location: Dubai, United Arab EmiratesConstructed: Estimated completion 2008Height: Total 818m, Top floor 624.1mNumber Of Floors: 164
Once completed this will be the tallest tower in the world, housing 30,000 people, restaurants, shops and leisure facilities. Once completed it will give the title of Earth’s tallest free-standing structure to the Middle East - a title not held by the region since 1311 AD when Lincoln Cathedral in England surpassed the height of the Great Pyramid of Giza, which had held the title for almost four millennia.

2nd: Taipei 101

An 800 ton mass damper helps stabilize the tower in high winds and earthquakes. This damper is an enormous ball of welded steel plates hanging inside the top of the building, and is visible from the restaurant and bar which encircles the space around the ball.
Location: Taipei, TaiwanConstructed: 1999-2004 Height: Total 509.2m, Top floor 439.2m Floor count: 101Elevator count: 61, with 2 double-decker elevators

3rd: Sears Tower

Forth in this list, the Sears tower has been the highest building in the USA since 1973, surpassing the World Trade Center and the Empire State Building.
Location: Chicago, Illinois, USA Construction: 1970-1974 Height: Total 527m, Top floor 435.8mFloor count: 110Elevator count: 104, with 16 double-decker elevators

In 1969, Sears, Roebuck & Co. was the largest retailer in the world. Sears executives decided to consolidate their employees into one building with predictions and plans for future growth. However, Sears’ optimistic growth projections never came to pass, and the company was obliged to take out a mortgage on its signature building. By 1995 Sears had completely vacated the building, which is now a multi-tenant office building with more than 100 different companies in residence.

4th: Shanghai World Financial Center

The most distinctive feature in the design of this building is a hole through its peak. Originally it was meant to be a circular moon gate, but the intended design began facing protests from Chinese, who considered it too similar to the rising sun design of the Japanese flag. Eventually this was changed to a trapezoidal hole, which incidentally made it cheaper and easier to implement.
Location: Shanghai, China
Construction: Estimated completion 2008
Height: Total 492m, T
op floor 472m
Floor count: 101
Elevator count: 31

5th: Petronas Towers

The Petronas Towers are the world’s tallest twin towers, and were the tallest buildings until the Taipei 101 building was completed in 2004.
Location: Kuala Lumpur, Malaysia
Constructed: 1992-1998
Height: Total 452m,
Top floor 375m
Floor count: 88
Elevator count: 78

The Petronas Towers still holds some world records though. The buildings were built on the world’s deepest foundations, at a mighty 120m deep, due to the depth of the bedrock. The towers also feature a skybridge connecting them, which is the highest 2-story bridge in the world at 170m above the ground.