A UNESCO World Heritage site, the fortified Old Town of Galle is an excellent place to begin exploring streets lined with Dutch colonial buildings, galleries and cafés, all surrounded by remarkably preserved ramparts. Take in the view from Galle Lighthouse before visiting the maritime museums, the 18th-century Dutch Reformed Church and the Historical Mansion Museum, housing an eclectic collection of antiques and collectibles. Across the bay in the town of Unawatuna, the gleaming white stupa of the Japanese Peace Pagoda stands atop a lush green hill overlooking picturesque beaches that are perfect for sunbathing, swimming and snorkeling. For a different perspective on the area’s natural beauty, take a river safari on the Madu Ganga to explore mangrove forests and watch for monkeys, monitor lizards and a variety of bird species.