Archi-Candy.

Petronas Towers, Kuala Lumpur, Malaysia.

Yep, they're cool. And made of reinforced concrete, instead of steel - the whole thing sits on 120 meter [!] deep foundations, the deepest in the world. The buildings utilize 23-by-23 meter concrete cores and a series of widely spaced super columns, which help provide 560,000 square meters of column-free office space.*

The lights go out at precisely midnight, which means that even an oil company sees the value in conserving energy....


*Taranath, Bungale S. (2004). Wind and earthquake resistant buildings: structural analysis and design. CRC Press. p. 748.