I think this would be an exciting time to be a scientist or archeologist in the field. With todays technology and computer abilities for radar, ground detecting and imaging there's so many tools at their disposal. Of course you still have to dig stuff up too.
Drone cameras routinely have all sorts of frequency scanning and abilities. From farm soil moisture and irrigation tracking to ground penetration tech by hand or drone or even satellite.
Just saw some vids about satellite systems that can penetrate foliage and reveal structures in almost impregnable jungles. Amazing stuff.