3D Undergound

Who knew: there is a website / service called DrillerDB that compiles all US well logs (something like 23 million) and also offers a 3D underground visuzalization based on these well logs. It's a little glitchy and I'm not sure about the accurcay & consistency of these data, but it would match the known regional geology prety well I would assume:

Try it here: https://drillerdb.com/underground and read more about it on Maps Mania.