Boudhanath is one of the largest stupas in the world, located in Kathmandu, Nepal. Also known as the Boudha or Bodhnath Stupa, it is a UNESCO World Heritage Site and a prominent pilgrimage site for Buddhists.

The stupa's construction dates back to the 14th century, and it is believed to have been built by the Licchavi dynasty. The stupa is said to have been built on the remains of Kasyapa Buddha's body, a legendary figure in Buddhist tradition.

The stupa stands at a height of 36 meters (118 feet) and is surrounded by prayer wheels, monasteries, and shops. The white dome-shaped structure is topped by a gilded spire and has a pair of eyes painted on all four sides, symbolizing the Buddha's all-seeing nature. The stupa is surrounded by a circular pathway, which pilgrims walk while chanting mantras.

Boudhanath is a significant center of Tibetan Buddhism and is home to numerous monasteries, including the Shechen Monastery, which is one of the six main Nyingma monasteries of Tibet. It is also a popular destination for tourists, who come to witness the stupa's grandeur and to observe the local religious practices.

Every year, Boudhanath hosts several religious festivals, including the Tibetan New Year, which falls in February or March. During the festival, the stupa is adorned with colorful prayer flags, and pilgrims perform circumambulation around the stupa while chanting prayers and burning incense.

Boudhanath is not just a religious site, but also a cultural hub, and visitors can explore the local handicraft shops, cafes, and restaurants surrounding the stupa, making it a must-visit destination in Kathmandu.