From the record
“Teapot Rock, also Teapot Dome, is a distinctive sedimentary rock formation and nearby oil field in Natrona County, Wyoming, that became the focus of the Teapot Dome bribery scandal during the administration of President Warren G. The site was listed on the National Register of Historic Places in 1974.”
Wikipedia article Teapot Rock, CC BY-SA 4.0.
One of 36 National Register listings published here for Natrona County · listed in 1974 · category: Site.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service