If you are ever in Singapore for a layover, you will find plenty of things to do. If you have less than three hours, it’s best to stick to the airport due to time constraints. Pamper yourself at a Foot and Calf Massage Station or workout in the gym. In the mood for nature? Tour the butterfly and orchid gardens, then catch a movie at one of the airport’s two complimentary movie theaters. If you have at least five hours to spare, go into town for a free sightseeing tour of some of Singapore’s most significant historical and cultural landmarks.