Altun Ha is the name given to the ruins of an ancient Maya city in Belize, located in the Belize District about 30 miles (50 km) north of Belize City and about 6 miles (10 km) west of the shore of the Caribbean Sea.
The site covers an area of about 5 miles (8 km) square. The ruins of the ancient structures had their stones reused for residential construction of the agricultural village of Rockstone Pond in modern times, but the ancient site did not come to the attention of archeologists until 1963.
The Old Northern Highway connects Altun Ha to Belize's Northern Highway, and the site is accessible for tourism. The largest of Altun Ha's temple-pyramids, the "Temple of the Masonry Altars", is 54 feet (16 m) high.
Altun Ha lies on the north-central coastal Plain of Belize, in a dry tropical zone. The site was very swampy during its pre-Columbian occupation, with very few recognizable water sources. Currently, the only recognizable natural water source is a creek beyond the northern limit of the mapped area. The water sources used during occupation were Gordon Pond, which is the main reservoir and the Camp Aguada, which is located in the site center. The site may have contained two chultuns, but provenience is lost since they are used in modern times.