Blenheim Palace
The underground labyrinth was added to the tale in 1516. However, Robert Gambles cites a 1231 reference to Rosamund's Chamber, with gardens, a cloister, and a well. According to local tales, Rosamund's Bower is said to have been pulled down when Blenheim Palace was built. A pool on the grounds of Blenheim Palace is known as Fair Rosamund's Well.