This is an offshoot of the Unseen University gardens just over the Ankh, across the Bridge of Size. It is a small garden on the Ankh's turnwise side walled off from Hen & Chickens Field and possibly also gated. Wizards are wont to take a short stroll about this area - smoking of course - to work up a suitably enormous appetite for dinner. About twelve steps were usually considered sufficient.
It featured in the game Discworld Noir as the location for the last of the Octogram of Murders needed to raise Nylonathatep from its prison. The dwarf Al Khali was dragged to his death by Anu-anu thus completing the eight deaths required.