Many needlepointers like to do an ornament to commemorate each trip. The Princess and Me has a large group of ornaments related to travel. One of my favorites is the London bus (it's called Tea and crumpets.) You might prefer Big Ben.
The ornament of Venice is wonderful. How nice it would be to do this one during a stay in Venice. (The New York Times had an article this past Sunday on a winter trip to Venice.)
There are also ornaments reflecting a trip to Paris.
