The spectacular opening of the Burj Khalifa, the tallest building in the world, in Dubai in January 2010 further enhanced the profile of the UAE as a sophisticated tourist destination. Investment is being poured into Abu Dhabi; the extension of the International Airport will increase its passenger handling capacity from 20 million to 50 million by 2010. The other emirates becoming increasingly popular as a contrast to the bling of Dubai and Abu Dhabi, offering Arab culture (Sharjah) and fantastic diving (Fujairah)