German submarine U-1273

Bastøy Lighthouse (Norwegian: Bastøy fyr) is a coastal lighthouse in Horten Municipality in Vestfold county, Norway. It is located on the island of Bastøy in the Oslofjorden, about 4 kilometres (2.5 mi) southeast of the town of Horten. It was established in 1840 and originally consisted of a stone house with a low tower. It was replaced by an automated light in 1986.

Bastøy Prison (Norwegian: Bastøy fengsel) is a low-security, male-only prison on Bastøy Island, Norway, located in the Horten municipality about 75 km south of Oslo. The prison is on a 2.6 km2 island and hosts 115 inmates making it the largest low-security prison in Norway. Arne Kvernvik-Nilsen, governor of the prison, leads a staff of 69 prison employees. Of this staff, only 5 employees remain on the island overnight. The prison is about one hour commuting distance from Oslo. Once a prison colony for young boys, the facility is trying to become "the first ecological prison in the world". Recidivism has been reported at 16%, compared to the European average of around 70%. Inmates are housed in wooden cottages and work the prison farm. During their free time, inmates have access to horseback riding, fishing, tennis, and cross-country skiing. The only access to the prison is from a ferry that departs from Horten.

Bastøy is an island in Horten Municipality in Vestfold county, Norway. The 2.23-square-kilometre (550-acre) island is owned by the government and it has no permanent residents, however, Bastøy Prison, a minimum-security prison, is located on the island, so there are always temporary residents on the island. The Bastøy Lighthouse was established on the island in 1840.

Tjøme Radio is a coast radio station in Horten, Norway. Operated by Telenor Maritim Radio, it has the responsibility for Skagerrak coast between Søgne and the Norway–Sweden border. It also covers the lake Mjøsa. Established in 1905 by the Royal Norwegian Navy, it became a civilian installation five years later. The station was located in Tjøme until 2008.

The Battle of Horten Harbour or the Action at Horten was an engagement that occurred on 9 April 1940. It took place during Operation Weserübung, when the Germans launched an amphibious assault on Karljohansvern, the Norwegian naval base at Horten. After being initially repulsed by Norwegian naval units, German troops headed overland to outflank the base, forcing it to capitulate.

Horten Church (Norwegian: Horten kirke) is a parish church of the Church of Norway in Horten Municipality in Vestfold county, Norway. It is located in the town of Horten. It is one of the churches for the Horten parish which is part of the Nord-Jarlsberg prosti (deanery) in the Diocese of Tunsberg. The red brick church was built in a long church design in 1855 using plans drawn up by the architect Christian Heinrich Grosch. The church seats about 750 people.

The Moss–Horten Ferry is an automobile ferry on Norwegian National Highway 19 that connects the counties of Vestfold and Østfold at the quays of Moss and Horten. The 10.5 kilometres (6.5 mi) crossing of Oslofjord is performed with three double-ended ferries operated by Bastø Fosen, making the crossing in 30 minutes, with departures twice an hour. In 2008 the line had a daily ridership of 3720 people and 4086 vehicles. It is the most trafficked car ferry line in Norway.

Preus Museum is the national museum for photography located in Horten, Norway. Preus Museum was founded in 1976 by Leif Preus and the members of the Preus family as a private museum. The collection was acquired by the Norwegian government in 1995. The museum's collection consists of photos and various other forms of images, together with cameras and related equipment which illustrate the history of photography. In 2001, the museum moved to the former naval facility at Karljohansvern in Vestfold county. The facilities have been adapted for museum use based on the work of architect Sverre Fehn.

is a town in Horten Municipality in Vestfold county, Norway. The town is located along the Ytre Oslofjord about 16 kilometres (9.9 mi) north of the town of Tønsberg and about 12 kilometres (7.5 mi) to the southeast of the town of Holmestrand. The town of Moss lies about 12 kilometres (7.5 mi) to the east, across the fjord. The 8.63-square-kilometre (2,130-acre) town has a population (2023) of 20,859 and a population density of 2,418 inhabitants per square kilometre (6,260/sq mi).

The Royal Norwegian Navy Museum (Norwegian: Marinemuseet) is a museum documenting the history of the Royal Norwegian Navy. It is located at the former main naval base of Karljohansvern in Horten. The museum was founded by C.F. Klinck on 24 August 1853. The museum is sometimes regarded as the world's first naval museum, as it was the first collection of naval memorabilia open to the public.

Karjohansvern (Karljohansvern Orlogsstasjon, KJV) at Horten was the main base for the Royal Norwegian Navy from 1850 to 1963.

Gullholmen Lighthouse (Norwegian: Gullholmen fyr) is a coastal lighthouse in the municipality of Moss in Østfold, Norway. The lighthouse is located in the outer Oslofjord, off the island Jeløya. It was established in 1894, and replaced by a light in 1984.