Phnom Penh, Cambodia’s busy capital, sits at the junction of the Mekong and Tonlé Sap rivers. It was a hub for both the Khmer Empire and French colonialists. On its walkable riverfront, lined with parks, restaurants and bars, are the ornate Royal Palace, the Silver Pagoda and the National Museum, displaying artifacts from around the country. At the city’s heart is the massive, art deco Central Market.