Locate landmarks in-flight
Ask the captain. When you see something remarkable and can’t figure out what it is, flag down a flight attendant, who will probably go ask the captain, who will probably be thrilled to show off his or her geographical expertise (even if all it involves is checking the GPS system). One time I was flying north from Phoenix and noticed a gaping pit in the desert floor. A helpful flight attendant went up to the cockpit and came back with a positive ID: it was the famous Meteor Crater, formed by a cosmic impact 50,000 years ago.