An outdoor retreat, but make it luxury. Malabar Hill is easily one of the most stunning, eco-retreats out there. Located on a jungle-covered hill top, begin your day with laps in the infinity pool, soak up the sun on your roof terrace and dine on some of the finest Sri Lankan grub. The villas may be private but don't be surprised if you see a monkey, mongoose or Malabar hornbill making itself at home.