What you see is what you get.
But sometimes there's more.
Walk into the Quad-City International Airport, and all the usual fixtures are there: concourse, ticket counters, security, baggage claim.
It's what you don't see that keeps the place running, and the planes in the air.
In her occasional series, Off Limits Places, columnist Barb Ickes takes us backstage at our airport, finding not-so-small nooks and crannies that were quite unexpected.