we all know that " burj khlalifa " is the tallest tower in the world since "2009" .
they started to built it in "6 january 2004" and it complete in "31 december 2009" and opened in "4 january 2010" .
and the spend alot of money to built it , the spend "1.5$billion usd" , and that's alote of money lol :P .
and this tower was designed by sdrian smith and it contains a total of " elevators " and " 8 escalators " .
and burj khalifa include " 30,000 homes " , " nine hotels " , "3 hectares " (7.4 acres) of park land , at least " 19 residential tower " Dubai borrowed at least " 80$ billion " for construction project in " 2000 s "
