This is the country’s main museum and showcases some of the most important aspects of Sri Lanka’s rich history. Some of the key highlights here are a large statue of Lord Buddha from the 9th century, King Wimaladharma’s throne (1693), 9th-century Boddhisatva sandals, the bedroom setup of Sri Lanka’s first PM D. S. Senanayake and the skeleton of a gigantic whale. The museum also houses a large number of ancient arts and crafts, masks, carvings, household utensils, swords and guns. You will also be enthralled by the amazing display of intricate jewellery belonging to members of ancient royal families. As it provides a fascinating look at the country’s history, it is hands down, one of the most important things to see in Colombo.