Kalmar Union, combination of the crowns of Denmark, Sweden, and Norway, effected at Kalmar, Sweden, by Margaret I in 1397. Because all three crowns were elective, the union could not be maintained by inheritance. Margaret's successors controlled Sweden intermittently until Gustavus I of Sweden dissolved the union (1523). Norway became independent in 1814.

Known as the "Garden Island," Kauai is Hawaii's oldest island and a tropical paradise. Covered with verdant rainforests, glittering waterfalls, and immense cliffs, Kauai will astound you at every turn. This island is the perfect destination for outdoor adventures, with activities from kayaking, to ziplining, to snorkeling. Better yet, marvel at the island's natural beauty, from the scenic cliffsides of Nāpali Coast State Wilderness Park to the resort beaches of Poipu.

Gijón sits on Spain’s northern coast in Asturias, shaped by its long relationship with the Cantabrian Sea. From its origins as a Roman settlement to its later growth as an industrial and port city, Gijón has balanced maritime work with civic life.

Turku, Finland’s oldest city, is a captivating blend of rich history and contemporary charm. Established in the early 13th century, Turku is renowned for its medieval architecture, including the majestic Turku Castle.

Malmö is Sweden’s third-largest city, located in the southern province of Skåne beside the Öresund Strait. Its position opposite Copenhagen has made it an important port, trading center, and meeting place, while the city today combines historic neighborhoods with modern architecture and extensive parks.