Leeds Castle is in Kent, England, 5 miles southeast of Maidstone. A castle has been on the site since 1119. In the 13th century it came into the hands of King Edward I, for whom it became a favourite residence; in the 16th century, Henry VIII used it as a residence for his first wife, Catherine of Aragon. The castle today dates mostly from the 19th century and is built on islands in a lake formed by the River Len to the east of the village of Leeds. It has been open to the public since 1976.
An aviary was added in 1980 and by 2011 it contained over 100 species, but it was decided to close it in October 2012 as it was felt the foundation could make better use of the £200,000 a year it cost to keep the aviary running. The castle and its grounds are a major leisure destination with a maze, a grotto, a golf course and what may be the world's only museum of dog collars.
It is a Grade I listed building (first listed in 1952) and recognised as an internationally important structure.