Hammond Castle Museum
- Museum
- Regional draw
- Gloucester
Hammond Castle Museum combines a dramatic coastal building with the story of inventor John Hays Hammond Jr.
Built as his home and laboratory in Gloucester, the castle-like complex incorporates historic architectural elements and collections in an unusual setting above the Atlantic shore.
Check the museum’s current tour options and reserve the experience you want before arriving. Guided visits, self-guided admission and special events can have different schedules and access arrangements. The photograph shows part of the castle exterior; the building’s historic layout means routes and accessibility should be reviewed in advance.
Visitor details reviewed October 18, 2026. Check official visitor information for current access, admission, and operating arrangements. View on OpenStreetMap.
Image credit: Dale E. Martin / Wikimedia Commons. Original source. CC BY 3.0. Resized and converted to WebP; may be cropped for display.
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