1. Gardens by the Bay
This 105-hectare park behind Marina Bay Sands is the single best reason to visit Singapore. The outdoor gardens are free, open from 5 AM to 2 AM, and worth seeing twice: once in daylight to appreciate the scale of the 18 Supertree structures (the tallest reaches 50 meters), and again after dark for the Garden Rhapsody light show at 7:45 PM and 8:45 PM. The show is free. Stand directly beneath the Supertrees and look straight up. The paid conservatories are where things get serious. The Flower Dome is the world's largest glass greenhouse, kept at a dry Mediterranean climate. The Cloud Forest has a 35-meter indoor waterfall surrounded by tropical mountain vegetation. Both are air-conditioned, which on a Singapore afternoon feels like a gift. If you only pay for one, choose Cloud Forest. As a must-see in Singapore and the top-ranked attraction in Asia on TripAdvisor, Gardens by the Bay gets crowded, especially on weekends. But unlike Merlion Park across the water, the space is so vast that you can always find a quiet corner. Among all the things to do in Singapore, this is where the city's "City in a Garden" ambition actually comes to life.