The Alexander Keiller Museum, housed in a 17th-century stable block adjoining Avebury Manor, tells the story of the site's discovery, excavation, and gradual recovery. Keiller's 1930s digs unearthed dozens of buried stones and the remains of several skeletons, including one man who had been pinned beneath a fallen stone in the 14th century — apparently a travelling barber-surgeon, judging by the scissors and probe found near him.
The museum holds the finds from Keiller's excavations — tools, pottery, carved chalk objects — alongside interactive displays explaining what the henge was probably used for. A second gallery, the Stables Gallery, covers the broader prehistoric landscape of the region. The museum is run by the National Trust and charges a modest admission; a combined ticket with Silbury Hill and West Kennet Long Barrow is available.