Singapore is probably the cleanest city in the world. No trash, cigarette butts or gum will be found on the ground. Visit both Chinatown and Little India. See the Singapore Botanic Gardens, which boasts a sprawling display of 60,000 orchid plants comprising of 400 species and more than 2,000 hybrids. Visit Merlion Park, next to Marina Bay, and the Merlion, Singapore's mythological creature that is part lion, part fish.