Airports might be our gateways to travel, adventure and a little extra sunshine, but some of them, especially the bigger hubs, have been getting bogged down by the increased traffic and convoluted patchwork of add-on terminals that are supposed to be handling the growth. And these hubs seem increasingly unavoidable. We've got concourses that feel longer than than some of the runways, check-in and security lines that make you wonder if you'll start to decompose before you reach the plane, gate-changes that feel like a twisted game of musical chairs, and delays to take-off, land and even find a parking spot. According to more than 2000 participants from over 80 countries who took the "World's Worst Travel Survey," here's the ranked list of top offenders. For more travel "worsts," check out the Titanic Awards.