What in geography, Should adults know?

adults should at least know all 7 continents, major capitols and the 8 wonders of the world.

Of course, it is important. start knowing the streets within your town, the location of school/s, hospitals and other important institutions. then know the neighboring towns and cities and their notable land marks. then the whole province or state you lived in, and the neighboring states/province and finally the whole country and the rest of the world their capital and their famous landmarks.

~start with learning the capitols of each state~