Oh, the amazing things you can learn in a library! Such as that Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch is a village in Anglesey in Wales and has the longest town name in the UK. The name means (in Welsh) "St Mary's church in the hollow of the white hazel near to the rapid whirlpool and the church of St Tysilio of the red cave".
For further reading, see the Wikipedia article here, or the website here. And here is a YouTube video of the pronunciation:
~Reese, who will put Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch on her list of places to visit in the UK.