Carolina Rediviva was erected between 1817 and 1841 and is home to Sweden's oldest university library, founded in 1620. Originally three stories high with two mezzanines, the building now spans 12 stories and has about 5 million books and 3,500 shelf meters of handwritten documents. When you walk through the entrance of the library, you'll come to the exhibition room, where you can view the famous Silver Bible from the 6th century, musical notations made by Mozart himself, medieval manuscripts, and Olaus Magnus' Carta Marina, printed in 1539.

The sandstone Christuskirche is, despite its modest size and unimposing appearance, somewhat of the city's symbol. Designed by a prolific German architect, the church marks an important era in Namibian history, and remains an attractive location for locals to exchange vows in marriage.

The Varna lighthouse is easily accessible on foot, about a 20-minute walk from the eastern port. Once there, you can enjoy panoramic views of Varna Beach, Bulgarian navigation ships, and the bustling port. It remains an interesting landmark, where graffiti artists have left their mark on the structure, adding a layer of urban character.

Uppsala University’s oldest existing building is now a museum for the university’s collections. There are mummies and ancient coins, as well as artefacts from the age of the Vikings, and instruments from Linnaeus, Rudbeck, and Celsius. The building also houses the imaginatively embellished Augsburg Art Cabinet and the Anatomical Theatre.