Twenty-six miles across, the island of Singapore is connected to Johor, Malaysia, by causeways. This tiny city-state has poured resources into a revitalized harbor district. Most people are aware of Singapore’s robust economy and eerily spotless rapid transit system; they may be less familiar with its Arab Quarter, vibrant food stalls and centuries-old temples. Singapore is the world’s second-largest port, and Changi Airport, the aviation hub for Southeast Asia, is consistently rated among the world’s best.