When both Marco Polo and Lonely Planet sing your praises, you must be doing something right. The 13th century adventurer described Sri Lanka as the finest island of its size in all the world, while the 21st century global travel publisher named it the best country to visit in 2019. Not bad, as endorsements go.
Known as Ceylon until 1972, Sri Lanka has crept under the mass-tourism radar for decades. Thailand received more than 38 million visitors in 2018; Sri Lanka made do with a…