Phra Tamnak Khao Kho

Phra Tamnak Khao Kho is a royal palace located on a hilltop in Khao Kho District, Phetchabun Province, northern Thailand. Built in 1984-1985 as a mountain residence for King Bhumibol Adulyadej and Queen Sirikit during visits to royal development projects, it features simple modern architecture surrounded by landscaped gardens. The palace is notable for its panoramic views of Khao Kho mountains and its role in the area's post-conflict development history.

Visitors can expect a hilltop royal residence set in landscaped gardens with manicured lawns, flower beds and pine trees. The low-rise palace building features simple modern Thai architecture and is surrounded by open terraces and viewpoints offering panoramic views of the Khao Kho mountains and valleys. The site includes garden paths, photo spots and interpretive displays about royal projects. Interiors are generally not open to the public; the visit focuses on exterior architecture, gardens and scenery.

Constructed in 1984-1985 on the initiative of the Royal Thai Armed Forces as a mountain residence for King Bhumibol Adulyadej (Rama IX) and Queen Sirikit. The palace served as accommodation during royal visits to support development and welfare projects for local communities in Khao Kho following the area's earlier period of conflict. It symbolizes the post-conflict rehabilitation and royal development efforts in Phetchabun's highlands.

The palace is a respected royal residence associated with the monarchy's development work in northern Thailand. It is maintained as a cultural landmark with landscaped gardens and is visited for its architectural simplicity and scenic setting rather than as a religious site.