Sao Din Na Noi

Sao Din Na Noi is a natural geological attraction in Si Nan National Park, Na Noi District, Nan Province, northern Thailand. It features dramatic earth pillars and eroded clay cliffs formed by natural wind and water erosion over thousands of years. The site resembles a ruined city with steep pinnacles and canyons and is one of Nan's most distinctive landscapes for sightseeing and photography.

Visitors can expect an open, arid landscape of tall, eroded soil and sandstone pillars, ridges and canyons with narrow walkways and elevated viewpoints. The area has viewing platforms and trails around the formations for sightseeing and photography. The surroundings are dry dipterocarp forest with little shade. There are small local shops and parking near the entrance. The site is compact and explored on foot.

The formations were created by long-term natural erosion of sandstone and clay deposits by wind and rain, estimated over thousands of years. The area was later included in Si Nan National Park, established in 1981, to protect its geological and forest landscape.

Locally known as Hom Chom, the site is associated with local folklore describing the pillars as remnants of an ancient city. It is a well-known landmark of Nan Province and an important site for nature education and domestic tourism.