ireland is the place to have an 18-hour layover, and the dublin airport is the best.
it helps when you have a friend with whom you can enjoy it, though..... otherwise you're just left to ponder one of your favorite quotes by your lonesome.
"I can never get over when you're on the beach how beautiful the sand looks and the water washes it away and straightens it up and the trees and the grass all look great. I think having land and not ruining it is the most beautiful art that anybody could ever want to own." - Andy Warhol