Pura Ulun Danu Buyan is a Hindu temple located on the shores of Lake Buyan in Pancasari Village, Sukasada District, Buleleng Regency, Bali. The temple is dedicated to Dewi Danu, the goddess of lakes and rivers, and serves as a site for ceremonies related to water and fertility. Surrounded by lush greenery and the serene waters of Lake Buyan, it offers a tranquil setting for visitors seeking spiritual and cultural experiences.