While not incredibly high-resolution, ground penetrating radar (https://en.wikipedia.org/wiki/Ground-penetrating_radar https://en.wikipedia.org/wiki/Ground-pene

While not incredibly high-resolution, ground penetrating radar (https://en.wikipedia.org/wiki/Ground-penetrating_radar https://en.wikipedia.org/wiki/Ground-penetrating_radar) is often used in archaeology to try and find buildings/artifacts without digging anything up.