SM UB-21

Invincible was originally a 74-gun ship of the line of the French Navy launched in October 1744. Captured on 14 May 1747, she was taken into Royal Navy service as the third rate HMS Invincible. She was wrecked in 1758 after hitting a sandbank. The wreck is a Protected Wreck managed by Historic England.

The sixth HMS Hazard was a Dryad-class torpedo gunboat of the Royal Navy. She was launched in 1894 and was converted into the world's first submarine depot ship in 1901. She collided with the submarine A3 on 2 February 1912, killing 14 men, and was herself sunk in collision with SS Western Australia on 28 January 1918.

Sinah Common is a 243-hectare (600-acre) biological Site of Special Scientific Interest on Hayling Island in Hampshire, England.This coastal site has maritime shingle grassland, some of which is rich in lichens, sand dunes, heath and saltmarsh. It has also been designated an SSSI because of its population of the endangered flowering plant childing pink at one of only two sites in Britain, and for its outstanding assemblage of other nationally scarce plants. There are also populations of nationally rare and scarce invertebrates.It lies adjacent to the Sinah Common World War II Heavy Anti-aircraft gunsite, a scheduled monument, with a small overlap.

Sinah is the area at the southwestern end of Hayling Island. It incorporates the Ferrypoint, Sinah Beach, The Kench, Sinah Warren, and Sinah Common. It is bounded to the east by West Town. Langstone Harbour and its entrance form the north and west borders, and to the south is Hayling Bay.

Fort Cumberland is a pentagonal artillery fortification erected to guard the entrance to Langstone Harbour, east of the Dockyard of Portsmouth on the south coast of England. It was sited to protect the Royal Navy Dockyard, by preventing enemy forces from landing in Langstone Harbour and attacking from the landward side. Fort Cumberland is widely recognised as the finest example of a bastion trace fort in England. It is a scheduled monument and a Grade II* listed building

Eastney is a district in the south-east corner of Portsmouth, England, on Portsea Island. Its electoral ward is called Eastney and Craneswater. At the 2011 Census the population of this ward was 13,591.

Klondike Gold Mine was a roller coaster at Funland Hayling Island. It was previously installed at Drayton Manor Theme Park, and transferred in 2005.

Eastney Beam Engine House is a Grade II -listed Victorian engine house in Portsmouth, Hampshire, England. Dating from 1887, it contains two 150 hp James Watt & Co. beam engines. The pumps were built as part of a plan to improve Portsmouth's sewage system. The other element of the plan was large holding tanks which held the sewage until the pumps could empty them into the ebb tide. The pumps have since been superseded by advancing technology but have been restored (in 1980). The restoration was funded by grants totalling £10,066 from Portsmouth city council, £4000 from Hampshire county council and £2000 from the Department of the Environment. The Engine House is now open to the public as a museum, owned by Portsmouth City Council (Museums Service) but operated by volunteers; consequently is only open on the last weekend in every month.

Funland Hayling Island is an amusement park on Hayling Island, near Portsmouth, England. Funland Hayling Island contains 18 rides, an amusement arcade (as well as various independently operating arcades nearby), Diane's Diner, a kids' play area and a pirate-themed golf course. The park is a typical funfair-styled park with the rides mainly being travelling rides from various independent funfair operators, with some rides sourced from other amusement parks.

The Royal Marines Museum is a museum on the history of the Royal Marines from their beginnings in 1664 through to the present day. A registered charity, it is also a designated service museum under the terms of the National Heritage Act 1983 and receives Grant-in-Aid from the Ministry of Defence. During 2011 it formally became part of the National Museum of the Royal Navy, an executive non-departmental public body of the Ministry of Defence. The museum's galleries are currently closed, pending relocation.

Eastney Barracks was a military installation occupied by the Royal Marines and located at Eastney near Portsmouth.

West Town is a village on Hayling Island in the borough of Havant in the county of Hampshire, England. It is on the south coast of the island, between Sinah to the west and Eastoke to the east. The wide area between the seafront road and the sea is known as Beachlands.