When interesting archaeology or history stories come my way I hop on Google Earth and take a look around. Many discoveries have been made by people who know what they're looking at from above and go out to the sites to poke around. I'd love to be able to get much closer to the ground that Google Earth allows, and people have made recommendations. Were those within Google Earth, or are they offerings from other companies?

I spent years working for the U.S. Forest Service and drew a lot of maps. There were many occasions when the work involved consulting aerial views of the land, so I've started this kind of armchair exploring decades earlier than Google was around.