One of the most popular tags for classifying mashups on this site is "travel". How popular? So far, 102 mashups at ProgrammableWeb have this tag. Most are mapping-related, often used to highlight locations for a specific destination like French Champagne houses, UK Bed and Breakfasts, NYC Broadway Shows or Hollywood celebrity hotels (and gossip):
Other travel mashups are more utilitarian including:
- Find Airport Parking: Find everything you need when rushing to the airport and need parking. Find out which airport parking facility is closest to you or to the airport, which is cheapest
- GMaps Flight Tracker: View incoming flights into 7 major US cities. Altitude, speed, heading and flight path are all interactively displayed on the map. Be air traffic control.
While yet other "travel" mashups are just different:
- Fatal Crash Data Maps: Search fatal crashes by zip code, driving directions, custom drawn polygons on Google Maps. Search results include crash details.
- Air Travel Emissions Calculator: A Google Maps mashup that allows you to calculate the per-passenger greenhouse gas emissions created by a commercial airline flight between any two airports.
- Random Day Out Generator: Pick where and the types of things you like to do and where. Watch it build your itinerary for the day.