It happened here in Norway. My local airport (ENJB) and the airport it was supposed to land at (ENTO), lie within 5 miles of each other, in fact my local airport has same runway headings and lies within the TMA of ENTO, or Torp. The PIC was presumably familiar with the area, but being swedish one never knows
Incidents like this have happened before, but luckily aircraft have never landed at the wrong airport.
Martin