Opening hours, prices and tickets for places worth your time.
The Valentin submarine pens are a vast reinforced-concrete U-boat factory on the Weser river in Bremen's Rekum district, built between 1943 and 1945 using forced labour. It was Germany's largest fortified U-boat facility after Brest, France, but was damaged by air raids before production could begin. The site is now the Denkort Bunker Valentin memorial.
An aquarium beside Herrenhausen Gardens in Hanover, part of the SEA LIFE chain, housed under a curved glass roof. Themed zones lead through an underwater tunnel to green sea turtles, Cuban crocodiles, blacktip reef sharks, rays and jellyfish, with touch pools for younger visitors.
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A garden complex in the Herrenhausen district of Hanover, laid out from the 17th century for the prince-electors of Hanover. The Großer Garten is a well-preserved Baroque garden, with parterres, fountains and a maze; the adjoining Berggarten has grown from a kitchen garden into a botanical garden with greenhouses and orchid collections.
Hanover's main Lutheran church, built in the 14th century in the northern German brick Gothic style and officially named for Saints George and James. Its west tower, one of the tallest in Lower Saxony, overlooks the market square; the roof and vaults, destroyed in a 1943 air raid, were rebuilt by 1952.
Hanover's city hall, opened in 1913 after twelve years of construction in an eclectic, castle-like style typical of the Wilhelmine era. It stands within the 10-hectare Maschpark, and a diagonal arched lift carries visitors up through the dome to a viewing gallery over the city, seasonally from March to November.
Tropical Islands is an indoor water park resort in a former airship hangar in Krausnick, Brandenburg, about 50km south of Berlin. It opened in 2004 inside the 360-metre-long Aerium hangar and features a tropical rainforest with around 50,000 plants, a swimming lagoon with a sandy beach, and a sauna complex, kept at 26°C year-round.
A museum of modern art beside the Maschsee in Hanover, opened in 1979 and extended in 1992 to a design by Peter and Ursula Trint with Dieter Quast. Built around the collection Bernhard Sprengel donated to the city in 1969, it holds major 20th-century works, including pieces by Hanover-born Dada artist Kurt Schwitters.
Almedalen is a park in Visby just outside the medieval city wall, on the site of the town's medieval harbour, which became too shallow as the land rose. Elms were planted in the 1870s and gave the park its name. It has a pond, lawns and a playground, and each summer it hosts the speeches of Almedalen Week, a meeting place for Swedish politics.
The Gotland Museum is the county museum of Gotland, founded in 1875 by the Friends of Gotland's Antiquity society. Its main building, Fornsalen on Strandgatan in Visby, shows the island's history from the Stone Age onwards, including the Picture Stone Hall with carved Viking-age stones, silver hoards such as the Spillings Hoard, and medieval church sculpture.
An artificial lake south of Hanover's city centre, created between 1934 and 1936 by damming and pumping water into a basin in the Leine river valley. Covering 78 hectares, it is the city's largest body of water, ringed by a path used by walkers and joggers, and used for sailing and rowing.
Visby City Wall is a medieval defensive wall built in two stages in the late 13th and 14th centuries around the Hanseatic town of Visby, a UNESCO World Heritage Site since 1995. About 3.4 km of the wall still stands, with 27 large and 9 small towers, gates such as Österport and Norderport, and the older Kruttornet tower at the harbour.
St. Catherine's Church Ruin, known in Visby as S:ta Karin, stands on Stora torget, the main square. It was the church of a Franciscan friary founded in 1233, enlarged into a three-aisled hall church with a new choir consecrated in 1391, and abandoned after the Reformation. Its open nave with slender pillars and brick vaults is part of the Visby World Heritage Site.
Visby Botanical Garden was laid out in 1855 by the society DBW inside the city wall, between the shore and the old town north of Almedalen, and took its present form in the 1930s. Its 2.5 hectares hold tree collections, a rose garden, a herb garden and plants such as fig, mulberry and walnut, with the ivy-covered ruin of St. Olof's church in its southern part.
Visby Cathedral, dedicated to Saint Mary, was built in the 13th century as the church of the German merchants trading in Visby and was consecrated in 1225. It is the only medieval church in the town still in use and became a cathedral in 1572. Its west tower and two eastern towers carry Baroque spires; inside are furnishings from several centuries.
St. Nicholas Church Ruin in the north of Visby's old town goes back to a church begun around 1215–1220 and taken over by Dominican friars in the 1220s, who rebuilt it as their friary church; the Gothic choir dates from about 1400. Burned in 1525, it has served since 1929 as a summer stage for concerts and plays. Its west gable has two round rose windows.
Westerplatte is a peninsula at the harbour entrance of Gdańsk, site of the Polish Military Transit Depot from 1926. The Second World War began here on 1 September 1939, when a German battleship shelled the depot; its garrison of about 200 held out until 7 September. Visitors see barracks ruins, guardhouses, a cemetery and the 1966 Monument to the Coast Defenders.
The European Solidarity Centre in Gdańsk is a museum and library on the history of the Solidarity trade union and other opposition movements in communist Eastern Europe. Its rust-coloured building by FORT Architects, recalling ship hulls, opened on 31 August 2014 beside Gate No. 2 of the shipyard, with a permanent exhibition and a roof terrace.
The National Museum in Gdańsk shows its Department of Early Art in a late-Gothic former Franciscan monastery on Toruńska Street, beside Holy Trinity Church. The collection's centrepiece is Hans Memling's triptych The Last Judgment of 1467–1471; the galleries also hold Dutch and Flemish paintings, Gdańsk furniture, goldsmiths' work and pewter.
The Polish Post Office Museum occupies the building where Polish postal workers held out for about 15 hours against German forces on 1 September 1939; 38 of the defenders were later sentenced and shot on 5 October 1939. Its exhibition, reopened in October 2026, covers the defence, the Polish community in the Free City of Danzig and the defenders' families.
The Main Town Hall stands where Long Lane meets the Long Market. Enlarged in 1379–1382, it gained its Renaissance spire with a gilded statue of King Sigismund II Augustus after a fire in 1556. Burned in 1945 and rebuilt, it has housed the city's history museum since 1970, with the decorated Red Hall; the tower gallery opens in summer.
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