Llanfairpwllgwyngyll (short version) is a large village and local government community on the island of Anglesey, Wales.
At 58 letters, Llanfairpwllgwyngyllgogerychwyrndrobwyllllantysiliogogogoch is the longest town name in all of Europe. It wasn't always the town's name, though—in the 1860s, the name was developed as a way to entice tourists to make the town a stop on their travels.
It's an amalgamation of the Welsh words and names for local landmarks.