It's a city with ample green spaces, but even in Singapore you probably wouldn't expect a building to sprout so much greenery from its façade. Tiers inspired by rice paddies dominate the lower levels of the 16-storey ParkRoyal on Pickering, and foliage spills out at regular intervals from ever-higher terraces. Architects WOHA and landscape specialists Tierra Design have continued the natural theme inside too: the lobby features a living wall of mosses and plants; the infinity pool on the fifth-floor terrace is backed by a two-storey waterfall draped in greenery; and pale green hues and wood dominate the hotel's 367 rooms. Apart from enchanting visitors, the thick vegetation acts as insulation, shade, and allows natural ventilation. So innovative is the design it has won the Green Mark Platinum Award, the highest rating for green buildings in Singapore. The hotel, located close to Raffles Place, between Hong Lim Park and Chinatown, also features a great rooftop bar.