• Balcony viewpoint at the top looks over Zemun's rooftops and the Danube, clearest on bright winter days
• Vertical staircases inside lead up through the tower, so plan to carry toddlers and leave the stroller below
• Fortress ruins around the base, the 14th-century corner towers and broken walls of Zemun Fortress, sit right on the hilltop plateau

Gardoš Tower is a 36-meter brick and stone lookout built in 1896, standing inside the ruins of the medieval Zemun Fortress on Gardoš hill. Inside, vertical staircases climb past an art gallery to a balcony viewpoint over the red roofs of Zemun and the Danube.

Kids can explore the crumbling fortress corner towers around the base, and locals still call it the Tower of John Hunyadi.