Category:Built in North America in 1973
Temperate regions: North America · South America · Africa · Europe · Asia · Oceania – Polar regions: – Other regions:
Countries of North America: Canada · Costa Rica · Dominican Republic · El Salvador · Mexico · United States of America‡
‡: partly located in North America
‡: partly located in North America
Subcategories
This category has the following 6 subcategories, out of 6 total.