Building MySg Lego

Indeed this year is special for Singapore. For the first time in 50 years, all students and teachers in Singapore will get a special commemorative Singapore50 Lego set of three iconic Singapore landmarks specially customized and designed by Lego. These three landmarks include the iconic Changi Airport, Cavenagh Bridge and the Gardens by the Bay. The public can only purchase these SG50 Lego set after National Day (9 August). 
Apparently for this set, you can only build one landmark at any one time. 

Which one will you build?