| O'Hara's Battery | |
|---|---|
| Part of Fortifications of Gibraltar | |
| Upper Rock Nature Reserve, Gibraltar | |
 Mediterranean Steps lead to the two batteries - O'Hara's in view | |
 Map of O'Hara's Battery (A-E), Engine Room (F), Equipment Exhibit (G), and Lord Airey's Battery (H). North is to the left. | |
  O'Hara's Battery | |
| Coordinates | 36°07′26″N 5°20′34″W / 36.123845°N 5.342880°W |
| Type | Artillery Battery |
| Site information | |
| Owner | Government of Gibraltar |
| Open to the public | Yes |
| Condition | Good |
| Site history | |
| Built | 1890 |
O'Hara's Battery is an artillery battery in the British Overseas Territory of Gibraltar. It is located at the highest point of the Rock of Gibraltar, near the southern end of the Upper Rock Nature Reserve, in close proximity to Lord Airey's Battery. It was constructed in 1890 at the former site of a watchtower that had earned the name O'Hara's Folly. The battery and tower were both named after the Governor of Gibraltar Charles O'Hara. The first gun mounted on the battery was a 6-inch breech loading gun, which was replaced with a 9.2 inch Mark X BL gun in 1901. The battery was in use during World War II and was last fired during training exercises in 1976. O'Hara's Battery has been refurbished and is open to the public. The battery and its associated works are listed with the Gibraltar Heritage Trust.