Portland Castle

Castletown is a small village in Underhill on the Isle of Portland in Dorset. It is located close to Fortuneswell, on the shores of Portland Harbour, and includes a sandy beach, as well as one of Portland's notable highlights; Portland Castle, while the Weymouth and Portland National Sailing Academy is also located nearby. As with the rest of Portland's villages and settlements, Castletown has been designated as a conservation area, as it is a place of special architectural and historic interest. Underhill, incorporating Castletown and other settlements became designated in 1976 with boundary extensions in 1997 and 2000.

The Portland Royal Naval Hospital was a naval hospital on the Isle of Portland, Dorset, England. Serving HMNB Portland at Portland Harbour, the hospital is located close to Castletown. Discounting earlier, temporary incarnations of the hospital, the permanent naval hospital was built at the beginning of the 20th century. It closed in 1957, when it was handed over to the National Health Service, which still runs the hospital as NHS Portland Community Hospital.

RNAS Portland was an air station of the Royal Navy from 1917. The site was first built in 1917 as HMS Sarepta within the confines of Portland Harbour as a seaplane base; the aircraft operating from the base's slipways. In 1959 it became RNAS Portland (HMS Osprey)

RNAS Portland (ICAO: EGDP) was an air station of the Royal Navy, situated at the Isle of Portland, Dorset, England. It was established in 1917 on the western edge of Portland Harbour as HMS Sarepta. From 1959 the station shared the name HMS Osprey, the anti-submarine establishment based at Portland, with helicopters used for research and development in anti-submarine techniques. RNAS Portland remained operational until 1999.

The Portland Mulberry Harbour Phoenix Units are two reinforced concrete caissons, built as part of the artificial Mulberry harbours that were assembled as part of the follow-up to the Normandy landings during World War II. Out of a total of 148 produced units, two units still remain at the Isle of Portland, in Dorset, southern England. They are located at Portland Harbour, close to Queen's Pier. The two units became Grade II Listed in 1993.

The Phoenix breakwaters were a set of reinforced concrete caissons built as part of the artificial Mulberry harbours that were assembled as part of the preparations for the Normandy landings during World War II. They were constructed by civil engineering contractors around the coast of Britain. They were collected at Dungeness and Selsey, and then towed by tugboats across the English Channel and sunk to form the Mulberry harbour breakwaters replacing the initial "Gooseberry" block ships. Caissons were added in the autumn of 1944 to reinforce the existing structure to cope with the harbour continuing in use longer than planned. Several Phoenix breakwaters still exist in Britain: two are part of the harbour off Castletown at Portland Harbour in Dorset, and two can be dived in less than 10 metres of water off Pagham in West Sussex. There is also a smaller Phoenix Caisson (type C) in Langstone Harbour in Hampshire.A wrecked Phoenix breakwater is also to be seen, broken in two, in the Thames estuary off Shoeburyness in Essex. It broke while being towed from Harwich in June 1944. To avoid it causing a hazard to shipping in the Thames estuary, it was beached on the mud on the northern edge of the Thames dredged shipping channel. It is about a mile from the beach. It is not quite covered at high tide, but it is topped by a beacon to warn shipping of its presence. Several Phoenix breakwaters were used in the Netherlands to plug gaps in the dykes, four of them for a dyke at Ouwerkerk after the North Sea Flood of 1 February 1953. These four have now been converted into a museum for the floods called the Watersnoodmuseum. One can walk through the four caissons. Two of the Phoenix breakwaters were sold to Sweden in 1949, initially towed to Frihamnen port in Stockholm and moved on 20 September 1956 to the newly-built heat and power plant in Hässelby where they remain as of 2021.

Merchant's Railway was a horse drawn and cable operated incline railway on the Isle of Portland, Dorset, England, built for the stone trade on the island. It was the earliest railway in Dorset, opening in 1826. The railway ran two miles from many working quarries at the north of Tophill, along the edge of Verne Hill, to a pier at Castletown, from where the Portland stone was shipped. It was in operation from 1826 to 1939. Since becoming disused the original path of the railway has become a popular public footpath.

Portland was a railway station on the Portland Branch Railway in the south of the English county of Dorset. The station opened with the Easton and Church Hope Railway, one of the constituent parts of a complex line, on 16 October 1865. The station was moved to a new site on the opening of the extension to Easton on 1 September 1902.After this, the old station was used as a goods station and depot. The extension was technically a separate railway, the Easton and Church Hope, although the branch was operated as one line throughout. The second Portland station had multiple platforms with canopies for the large staff of the Admiralty establishments around it. The station closed to passengers in 1952, although regular freight kept the line in use until 1965. The platforms and canopies survived until the mid-1970s when the site was absorbed by the base and demolished.

Victoria Square is a public square on the Isle of Portland, Dorset, England. Developed in the 19th century, it is situated at the entrance to Portland, close to Chesil Beach, Osprey Quay, and the small fishing village of Chiswell.

Victoria Gardens is a public garden, located at Underhill, Isle of Portland, Dorset, England. It is found close to Fortuneswell village and overlooks both Victoria Square and Chiswell. The gardens, which were created to mark the 1897 Diamond Jubilee of Queen Victoria, have remained a focal point since their opening in 1904.The gardens are made up of grassed and formal bedding areas, with a large rockery running along its centre. There is a children's play area, tennis courts and a bowling green managed by the Portland Victoria Bowls Club.

Chiswell , sometimes , is a small village at the southern end of Chesil Beach, in Underhill, on the Isle of Portland in Dorset. It is the oldest settlement on the island, having formerly been known as Chesilton. The small bay at Chiswell is called Chesil Cove, and the beach promenade and sea wall which form Chiswell's coastal defences are a prominent feature. The village occupies much of the flat land close to sea level adjacent to the beach, and is distinguished from the adjoining village of Fortuneswell which occupies the steeper hills and streets above. At the northern entrance to the village is the 19th-century development of Victoria Square, which forms a roundabout on the main A354 road onto the island. As with the other villages and settlements on Portland, Chiswell was designated as a conservation area as part of Underhill in 1976, as it is a place of special architectural and historic interest. The village has been maintained by the Chiswell Community Trust since 2003.

The Weymouth and Portland National Sailing Academy is a centre for the sport of sailing on the Isle of Portland, Dorset, on the south coast of England. The academy building is located in Osprey Quay on the northern tip of the island, and the waters of Portland Harbour and Weymouth Bay, adjacent to the site, are the main areas used for sailing. Local, national and international sailing events have been held at the site since it was opened in 2000, and in 2005 WPNSA was selected to host the sailing events at the 2012 Olympic and Paralympic Games.