Speckled with numerous exemplary works of art and architecture, Kathmandu Valley stands a testimony to ancient Nepal's inclination toward the aesthetics. Several monuments in the Valley have been listed by UNESCO as World Heritage Sites. Lumbini, the birthplace of Lord Buddha, is the only World Heritage Site outside the Valley in South Nepal.

Like architecture, most artwork of Nepal is based on religion. Artworks range from the famous Buddhist Thanka and Newari Paubha paintings to the traditional crafts of woodwork and metal. Other art include literature, theater, music and dance, mirroring the different stages of Nepali society.

Nepali art has been deeply influenced by religion since very early times. Early art of Nepal can be seen as stone sculpture and temple architecture. Other art include Newari Paubha and Tibetan Thanka paintings, wood and metal crafts, ceramics and clay pots, textiles, paper, Tibetan carpet, music and literature. Contemporary Nepali art represents two distinct segments, traditional idealistic paintings and the contemporary western style works. The contemporary painting is specially noted for either nature based compositions or compositions based on Tantric elements or social themes. Nepali painters have also earned international reputation for abstract works based on these themes.

Kathmandu Valley houses a number of museums and art galleries displaying art work of the past and present. Some are: The National Museum at Chhauni, Museums at Kathmandu Durbar Square, Museum of Natural History at Swayambhu, National Library at Puchowk, Kaiser Library at Thamel, National Birendra Art Gallery at Naxal, Asa Archives at Tangal, National Art Gallery at Bhaktapur Durbar Square, National Woodworking Museum at Bhaktapur Durbar Square, Bronze and Brass Museum at Bhaktapur, Nepal National Ehnographic Museum at Bhrikuti Mandap. Museums outside the Kathmandu Valley are such: Dhakuta Museum, Hattisar Museum in Bhimphedi, Mustang Eco Museum in Jomsom, Tharu Cultural Museum in Thakurdwara and International Mountain Museum in Pokhara.