Pula’s ever-popular aquarium occupies the floor of the city’s 14th-century AustroHungarian fortress. Highlights of the aquarium include the large sea water tanks that contain representatives of North Adriatic flora and fauna and a massive open tank that contains dogfish, sea urchins, crabs and star fish. Visitors can also take a boat ride to get a closer look at the aquarium’s inhabitants.

The gorgeous and elegant Museum of Cycladic Art contains more than 3,000 artefacts of Cycladic, Ancient Greek and Cypriot art pieces on display over four floors. This is an interesting museum to visit to get a greater understanding of this colourful culture.

The George Peabody Library is one of those hidden gems that leaves you in awe the moment you step inside. Housed in a breathtaking 19th-century building, it's a place where you can lose yourself among rows of books and beautiful architecture. Located at Johns Hopkins University, the library is open to the public, and visitors can wander through its five-tiered atrium, marveling at the iron railings and towering shelves packed with rare volumes. Whether you're a book lover or just looking for an Instagram-worthy spot, it’s definitely worth a stop.

The Arch of Sergius (also referred to as the Golden Gate of Pula) commemorates the Sergii, one of the most influential families in the early Roman colony. The arch stood behind the original naval gate of the city and was paid for by the wife of Lepidus, Salvia Postuma. Their names are carved in the stone along with Lucius Sergius and Gaius Sergius. In its original form, statues of the two elders flanked Lepidus on both sides on the top of the arch.