This wasn't a matter of landing at the wrong airfield, but during my CPL training, an instructor pointed something out to me.
I was sent to find a radio mast, I found it. The instructor said "Is that it? Are you sure?" and it wasn't really something I'd thought about. I just used DR to get to the mast, but didn't think about how I knew it was the correct mast. She next took my map off me, and pointed about 6-8 surrounding things, golf courses, powerlines etc. to prove that it was the particular radio mast. I guess looking for proof seems to never go astray, whether it be icons on a map, navaids saying what they should say, a GPS saying where you are, or all of it deducing the same outcome.