Tourists visit the Hanumandhoka Durbar Square, a UNESCO heritage site in Kathmandu, Nepal, Dec. 14, 2018. Nepal tourism sector saw an unprecedented achievement in 2018 as the Himalayan country witnessed arrival of foreign tourists by more than 1 million in a year for the first time in history, Nepal Tourism Board (NTB) said on Thursday. (Xinhua/Sunil Sharma)