
St Mark's Church
A medieval church crowned by a famous tiled roof bearing the coats of arms of Croatia and Zagreb.
Photo: Jorge Franganillo / CC BY 2.0

A WWII shelter tunnel threading under the Upper Town.
Photo: Miroslav Vajdic from Zagreb, Croatia / CC BY-SA 2.0
Dug as a bomb shelter in 1943, this network of tunnels runs right under the medieval Upper Town, linking the streets above to the Lower Town below. Cool in any heat and faintly eerie, it's free to walk and reopened as a public passage and event space: a literal underground shortcut that locals use to skip the hill.
It's a free, air-conditioned shortcut through the hill: use it to cross town on a scorching afternoon.
A small next-step selection from the same city.

A medieval church crowned by a famous tiled roof bearing the coats of arms of Croatia and Zagreb.
Photo: Jorge Franganillo / CC BY 2.0

The home and studio of Croatia's greatest sculptor.
Photo: Bernard Gagnon / CC BY-SA 4.0

A forested memorial park to the victims of fascism, with sculptures by Vojin Bakić.
Photo: Plamen at Serbian Wikipedia / Public domain
Use the free map from home, then verify the discovery when you reach the place.