Translation: "The church of St. Mary in the hollow of white hazel trees near the rapid whirlpool by St. Tysilio's of the red cave"
This is the name of a Welsh town - it contains 51 letters (Welsh double l counts as one). The name of the town was much much shorter prior to the 1800s, when the town council extended the name as a way to encourage trains, travellers and tourists to stop en route to Chester or Holyhead. However, this is not the longest place name around.
Translation from Maori:"The brow of the hill where Tamatea, with the bony knees, who slid and climbed mountains, the great traveller, sat and played on the flute to his beloved."
This is a town in New Zealand and is the current holder of the Guiness World Record for longest place name (92 characters I think), although apparently there's a place in Thailand which isn't counted.....