Senj's biggest (and some say only) attraction is the Nehaj Fortress, which was built in the mid-16th century by Uskok Captain Ivan Lenkovic. Ivan tore down unprotected buildings outside the fortifications to get construction materials because he reasoned the structures would be sitting targets anyway. The exhibits inside the three-story fortress trace the history of the Uskoks and display weapons, clothing, and other artifacts related to the times. Captions are in Croatian and English. The fortress was rehabbed in 1977 and now serves as the city's symbol. You can climb to the top for unparalleled views of the sea and Senj.