» Why Nevada is a good place for hot springs
Nice map. Shows the heat flux coming up through the crust in the conterminous U.S.
(Just as an aside, note the scale here: average geothermal heat fluxes are on the order of 0.1 Watts per square meter. Compare that to incoming solar radiation at 1366 W/m^2. That’s why hugging the ground at night won’t warm you up.)