The viaduct’s distinct curve is clearly visible in this picture of the famous Nine Arch Bridge between Ella and Demodara, in the Central Highlands of Sri Lanka. If you can’t — or don’t want to — crowd your way onto a train crossing the bridge on what is now considered one of the world’s great train journeys, walking along the tracks is a great way to get a closer look. The rails are the only steel used on the Nine Arch Bridge, which was constructed entirely of stone due to a shortage of steel during World War I. Walking on railway tracks is illegal in Sri Lanka, though rarely enforced, but watch out for trains; scores are killed each year, all over the country; and a narrow bridge and a tunnel right by it make it a tricky spot for the careless. Shot on assignment for The New York Times, specifically for Lucas Peterson’s piece, An Island Nation that is Best Savored Slowly, which ran in the Frugal Traveler column on January 30th.