Contributor AVEA - Alta Vistic Epic Aerial created this marvelous drone video of a famous fortress in northern Wales. Harlech Castle is situated within Snowdonia National Park in Gwynned County. The great landmark was built by King Edward I during his conquest of Wales in the late 13th century. During the War of the Roses in the 15th century, Harlech was the site of a famous seige by Yorkist forces which ended in a Lancastrian surrender in 1468. It's known as the longest seige in British history.