Heath is a city in Licking County, Ohio, United States, and is located approximately 30 mi (48 km) east of Columbus.

They built large earthworks, including ancient burial mounds which are now preserved within Moundbuilders State Memorial on the north side of the city.

The complex originally covered more than 3,000 acres, and was surveyed before 1850 by a team for the Smithsonian Institution.

The 1,054-foot (321 m)-wide Newark Great Circle is one of the largest circular earthwork in the Americas, at least in construction effort.

A 5-foot (1.5 m) deep moat is encompassed by walls that are 8 feet (2.4 m) high; at the entrance, the dimensions are even more grand.

[5] The Newark Earthworks is operated as a state park by the Ohio History Connection.

In the process of clearing and cultivating land, farmers destroyed some of the earthworks in the 19th and 20th centuries.

After World War II, Newark Air Force Base was established here, and it operated for 35 years as the seat of United States Air Force Aerospace Guidance and Metrology Center.

This function is now served by AFMETCAL and the contractor-operated Air Force Primary Standards Lab.

Over the next decade, Heath grew quickly, going from a population of 2,426 in 1960 to 6,066 in 1965, when it was chartered as the 196th city in Ohio.