Refshaleøen, Copenhagen

Copenhagen Suborbitals is a crowd-funded, open-source human space program. It has flown five home-built rockets and two mock-up space capsules since 2008. The organization successfully launched its Nexø II rocket in the summer of 2018. Its stated goal is to have one of its members reach space (above 100 km) on a sub-orbital spaceflight. The organization was founded by Kristian von Bengtson and Peter Madsen.The program's 55 members work on it during their free time and elect a chairman and board members at their annual general assemblies. As of 2019, the chairman is Carsten Olsen.

B&W Hallerne (English: The B&W Halls) is a former industrial complex located on the island of Refshaleøen in Copenhagen, Denmark. Built in the early 1960s by Burmeister & Wain, the complex consists of two large halls which were used to build ships until 1996. Currently, the facilities are used for culture and entertainment activities.On 2 September 2013, Danish public broadcaster DR announced that it had chosen B&W Hallerne as the host venue for the Eurovision Song Contest 2014. The contest was held at the Section Hall 2, which was converted into a music venue with a capacity for 11,000 spectators. The surrounding buildings and areas were transformed into "Eurovision Island" which was used for additional services related to the contest.

Amager Bakke (lit. 'Amager Hill'), also known as Amager Slope or Copenhill, is a combined heat and power waste-to-energy plant (new resource handling centre) and recreational facility in Amager, Copenhagen Denmark, located prominently within view of the city's downtown. The facility opened in 2017, and partially replaced the nearby old incineration plant in Amager, which is in the process of being converted from coal to biomass (expected to complete in 2020). The two plants play a major role in Copenhagen's ambitions of meeting zero carbon requirements by 2025.The recreational components of the facility (the dry ski run, hiking trail and climbing wall) opened in December 2018, with an attendance estimated at 42-57 thousand visitors annually.Copenhill was named the World Building of the Year 2021 at the fourteenth annual World Architecture Festival.

Noma is a three-Michelin-star restaurant run by chef René Redzepi, and co-founded by Claus Meyer, in Copenhagen, Denmark. The name is a syllabic abbreviation of the two Danish words "nordisk" (Nordic) and "mad" (food). Opened in 2003, the restaurant is known for its focus on foraging, invention and interpretation of New Nordic Cuisine. In 2010, 2011, 2012, and 2014, it was ranked as the Best Restaurant in the World by Restaurant magazine. In 2021 it won the first spot in the World's 50 Best Restaurants Awards.

Nyholm Central Guardhouse is a historic building at Holmen in Copenhagen, Denmark. It was built in 1745 as part of the Nyholm Naval Base which had been established on reclaimed land at the site in 1690.

Trekroner Søfort (literally Three Crowns Sea Fortress) is a sea fort at the entrance to the Copenhagen harbour. From 1713 until after World War I, Trekroner Fort was part of the fortifications of Copenhagen. The original location of Trekroner Fort was a few hundred meters north of the current one. In 1713, three old ships of the line were sunk to form the basis for a battery. One of the ships was called Trekroner, and she gave her name to the fort. Construction of the current fort began in 1787. The fort was an important part of the Danish line of defense during the Battle of Copenhagen in 1801. The fort also was engaged during the British attack on Copenhagen in 1807. From 1818 to 1828 and in 1860, the fort was strongly enhanced, but its military significance diminished after the First World War. In 1934 it was sold to the Copenhagen harbour services. During the German occupation of Denmark the Germans used the fortress as a barracks. After the war it was used for a few years as a prison for German officers and the former German ambassador to Denmark. Afterwards, it fell vacant until 1984, when it was opened to the public. Trekroner Fort is one of three artificial islands that were created to defend the entrance to Copenhagen's harbor. (The other two are Middelgrundsfortet and Flakfortet.)

The Battle of Copenhagen of 1801 (Danish: Slaget på Reden, meaning "the battle of the roadstead [of Copenhagen Harbour]"), also known as the First Battle of Copenhagen to distinguish it from the Second Battle of Copenhagen in 1807, was a naval battle in which a British fleet fought and defeated a smaller force of the Dano-Norwegian Navy anchored near Copenhagen on 2 April 1801. The battle came about over British fears that the powerful Danish fleet would ally with France, and a breakdown in diplomatic communications on both sides. As the British ships entered the harbour of the Danish Navy, several of its ships took up station at the harbour's roadstead, forming a blockade. The Danish fleet defended the capital with these ships and bastions on both sides of the harbour inlet. It was the second attempt by the British to try to prevent a Franco-Danish alliance, as the British had already entered Øresund with a fleet in August 1800, in order to persuade Denmark not to ally with France. The Danes agreed to the British terms upon hearing news of the assassination of Tsar Paul I of Russia, as his death meant the end of the Russian-led League of Armed Neutrality of which Denmark was a member.

Mastekranen (English: The Masting Crane) is an 18th-century masting sheer and present landmark on Holmen in Copenhagen, Denmark. It was designed by architect Philip de Lange and built in 1748–51 as part of the Royal Naval Shipyard at Holmen.

The Royal Danish Naval Academy (Danish: Søværnets Officersskole or more commonly, Søofficerskolen) educates and commissions all officers for the Royal Danish Navy. Having existed for more than 300 years, it is the oldest still-existing officers' academy in the world.

HDMS Sehested (P 547) was a Willemoes-class fast attack craft of the Royal Danish Navy which was in commission from 1978 until 2000. It is now docked at Holmen in Copenhagen where it serves as a museum ship, part of the Royal Danish Naval Museum. The ship is named after Christen Thomesen Sehested, a Danish vice-admiral during the Great Northern War (1709-1721).

HDMS Sælen (S323) (or KDM Sælen ) is one of the three Tumleren-class small coastal submarines of the Royal Danish Navy.

HDMS Peder Skram (F352) was a Peder Skram-class frigate in the Royal Danish Navy which was in use until 1990. It is now docked at Holmen in Copenhagen where it serves as a privately operated museum ship along with the ships of the Royal Danish Naval Museum. The ship is named after Peder Skram, a 16th-century Danish admiral.