Most of the geothermal publicity has been focused on Fenton Hill, site of the Hot Dry Rock (HDR) work from the early 1970s to the middle 1990s, and Valles Caldera, an industry exploration site that was not brought to production. However, two of the nation’s largest geothermally-heated greenhouse operations are located in the state (Burgett and Masson), along with a major aquaculture raising facility (AmeriCulture), and the heating of a university campus (New Mexico State University). Spas and resorts heated with geothermal are also scattered around the state