A Quick Overview Of Burj Khalifa
The Burj Khalifa is th world's tallest building - it is located in Dubai.
You pronounce Burj Khalifa with a hard 'j' at the end of 'Burj' and, in Arabic, the 'kh' has the guttural sound of the 'ch' in loch. Practically it is perfectly acceptable for English speakers to anglicize the sound by pronouncing it like a 'k'.
The website for the Burj Khalifa can be found here.