Discover one of the oldest national parks, Sri Lanka National Park, among the top national parks known for leopards. Visit Anuradhapura has been inhabited for more than 2,000 years and offers well-preserved ruins that speak to an ancient Sri Lankan civilization. Venture north by train to the city of Jaffna and northern Sri Lanka that until recently were cut off from the rest of the world. Go to the small Delft Island, lined with walls of coral, with no cars and amazing feral horses. Climb to the top of the 5th-century Rock Fortress of Sigiriya.