
Pula Arena
One of the world's best-preserved Roman amphitheatres.
Photo: Olgierd Rudak / CC BY-SA 4.0

Photo: Michael Newman / CC BY 3.0
Built in the nineteenth century as a coastal fort of the war harbour, Fort Verudela now houses the Pula Aquarium. Where soldiers once stood guard, sea creatures from the Adriatic and more distant waters drift through tanks set into the old casemates. The blend of cool fortress stone and glowing underwater worlds makes the visit special.
The aquarium runs a rescue centre for sea turtles; ask about its current patients.
A small next-step selection from the same city.

One of the world's best-preserved Roman amphitheatres.
Photo: Olgierd Rudak / CC BY-SA 4.0

Tito's island paradise of dinosaurs and safari.
Photo: Wikimedia Commons / CC BY-SA 4.0

A cool maze of WWI tunnels beneath the city hill.
Photo: Psittacuso / CC BY-SA 4.0
Use the free map from home, then verify the discovery when you reach the place.