Tourists visit Patan Durbar Square, a UNESCO world heritage site, in Lalitpur, Nepal, April 18, 2025. The International Day of Monuments and Sights, or World Heritage Day, is celebrated every year on April 18. (Photo by Hari Maharjan/Xinhua)

Tourists visit Patan Durbar Square, a UNESCO world heritage site, in Lalitpur, Nepal, April 18, 2025. The International Day of Monuments and Sights, or World Heritage Day, is celebrated every year on April 18. (Photo by Hari Maharjan/Xinhua)

Tourists visit Patan Durbar Square, a UNESCO world heritage site, in Lalitpur, Nepal, April 18, 2025. The International Day of Monuments and Sights, or World Heritage Day, is celebrated every year on April 18. (Photo by Hari Maharjan/Xinhua)

Tourists visit Patan Durbar Square, a UNESCO world heritage site, in Lalitpur, Nepal, April 18, 2025. The International Day of Monuments and Sights, or World Heritage Day, is celebrated every year on April 18. (Photo by Hari Maharjan/Xinhua)