6. Singapore

One of the best (urban) planned and cleanliest metropolitan cities in the world, Singapore looks like an architectural model city come to life. The buildings cannot be higher than 280 meters due to air traffic control restrictions, but that has added a tall (but not too tall) and consistent building height and space pattern that makes this skyline unique: Three buildings are exactly 280 meters tall and 5 others (8 total) stand at just over 200 metres. The buildings are mostly light-coloured and there is a large expanse of greenery dotted around the city core. This South-Eastern city is definitely in a league of its own.

Metro/Urban Population: 3.8 million