Dochula Pass holds 108 memorial chortens, the Druk Wangyal Chortens, built in honour of Bhutanese soldiers who died in the country's military operations. Perched over 3,000 metres on the Thimphu-Punakha highway, the pass offers some of Bhutan's best mountain views on a clear day, and its slopes are strung with five-coloured prayer flags: blue for sky, red for fire, green for water, white for clouds, and yellow for earth.