The Burj Dubai is more than 800 metres high, becoming the world's tallest building (Getty Images)

The top of the tower can be seen for 95km (AP)

The Burj Dubai can be seen in the distance. Dubai's seven-star hotel, the only one of its kind in the world, can be seen in the forefront (Getty Images)

The height of the tower is a closely guarded secret, and the official number won't be revealed until its opening on the 5th of January (Getty Images)

The structure has been built as the heart of a multi-billion dolloar project named Downtown Burj Dubai, which includes a massive shopping centre touted as one of the biggest in the world (Getty Images)

The Dubai structure is far bigger than its nearest rival, Taipai 101, which stands at just over 500m high (Getty Images)

Construction of the building began in 2004 (Getty Images)

It had been due to open in 2008, but the opening date was pushed back (AP)

It's hoped the tower will encourage tourism and business in Dubai, which has been struggling amidst a financial crisis (AP)