Falling under the category, simply useful, I stumbled across this excellent website for geothermal information in map format for the state of Oregon, the “Geothermal Information Layer for Oregon” (GTILO).

“The interactive GTILO map lets you view information on location, temperature, and other features of thermal springs and wells (geothermal exploration, geothermal test, and water wells) as well as known geothermal resource areas and direct-use areas.”

There are similar maps available for some other states and countries, which I will continue to collect to present at a later stage.

Source: Oregongeology.org