Copenhagen, Denmark’s capital, sits on the coastal islands of Zealand and Amager. It’s linked to Malmo in southern Sweden by the Öresund Bridge. Indre By, the city's historic center, contains Frederiksstaden, an 18th-century rococo district, home to the royal family’s Amalienborg Palace. Nearby is Christiansborg Palace and the Renaissance-era Rosenborg Castle, surrounded by gardens and home to the crown jewels.

Bornholm is a Danish island in the Baltic Sea off the south coast of Sweden. In its north are the clifftop ruins of Hammershus, a medieval castle. By the jagged Helligdomsklipperne rocks near the town of Gudhjem, Bornholm Art Museum shows the work of painters attracted by the island’s natural light. West, in the port town of Rønne, Bornholm Museum reflects 10,000 years of local history, including the WWII occupation

Gdańsk (Danzig in German) is a port city on the Baltic coast of Poland. At the center of its Main Town, reconstructed after WWII, are the colorful facades of Long Market, now home to shops and restaurants. Nearby is Neptune Fountain, a 17th-century symbol of the city topped by a bronze statue of the sea god. Gdańsk is also a center for the world’s amber trade; boutiques throughout the city sell the ossified resin.

Klaipėda is a port city in Lithuania, where the Baltic Sea meets the Danė River. The old town features German-style, 18th-century wood-framed buildings. Theater Square, the city’s main gathering spot, is home to the neoclassical Drama Theater. The square’s 1912 Taravos Anikė sculpture pays tribute to a local poet. The waterside Lithuanian Sea Museum includes dolphin shows and maritime exhibits in a 19th-century fort.

Riga, Latvia’s capital, is set on the Baltic Sea at the mouth of the River Daugava. It's considered a cultural center and is home to many museums and concert halls. The city is also known for its wooden buildings, art nouveau architecture and medieval Old Town. The pedestrian-only Old Town has many shops and restaurants and is home to busy Livu Square, with bars and nightclubs

Stockholm, the capital of Sweden, encompasses 14 islands and more than 50 bridges on an extensive Baltic Sea archipelago. The cobblestone streets and ochre-colored buildings of Gamla Stan (the old town) are home to the 13th-century Storkyrkan Cathedral, the Kungliga Slottet Royal Palace and the Nobel Museum, which focuses on the Nobel Prize. Ferries and sightseeing boats shuttle passengers between the islands.

Stockholm, the capital of Sweden, encompasses 14 islands and more than 50 bridges on an extensive Baltic Sea archipelago. The cobblestone streets and ochre-colored buildings of Gamla Stan (the old town) are home to the 13th-century Storkyrkan Cathedral, the Kungliga Slottet Royal Palace and the Nobel Museum, which focuses on the Nobel Prize. Ferries and sightseeing boats shuttle passengers between the islands.

Tallinn, Estonia’s capital on the Baltic Sea, is the country’s cultural hub. It retains its walled, cobblestoned Old Town, home to cafes and shops, as well as Kiek in de Kök, a 15th-century defensive tower. Its Gothic Town Hall, built in the 13th century and with a 64m-high tower, sits in historic Tallinn’s main square. St. Nicholas Church is a 13th-century landmark exhibiting ecclesiastical art.

Helsinki, Finland’s southern capital, sits on a peninsula in the Gulf of Finland. Its central avenue, Mannerheimintie, is flanked by institutions including the National Museum, tracing Finnish history from the Stone Age to the present. Also on Mannerheimintie are the imposing Parliament House and Kiasma, a contemporary art museum. Ornate red-brick Uspenski Cathedral overlooks a harbor.