City Museum Novalja

The City Museum of Novalja is your gateway into the surprisingly rich history of this part of the island of Pag, covering everything from ancient Rome to local heritage. The undisputed highlight is the underground Roman aqueduct — a 2,000-year-old hand-carved tunnel you can actually walk through, which is genuinely rare anywhere in the world. It's a little eerie, a lot impressive, and kids tend to love it just as much as history buffs.