Homebound from Switzerland

 I am currently sitting in the airport in Frankfurt, Germany, waiting for my flight home. We just completed a last minute ski trip to Switzerland that included a front-end extension to Budapest, Hungary. This extension added a new country to my list of countries I've visited, a new airport to my list of airports I've flown in or out of, and a new site to my list of UNESCO World Heritage sites I've visited. I've edited each of those lists to update them to include Hungary, the Budapest Airport, and Budapest itself, which is included on the UNESCO list. The last of these came as a bit of a surprise because we booked this trip so late that I really didn't have any opportunity to research our destinations. It was only when our tour guide mentioned the World Heritage Site status while we were on Castle Hill that I realized that I had, quite inadvertently, added another to my list.