Zagreb pairs the Upper Town's St Mark's Church tiled-roof with the cathedral's twin spires, the Museum of Broken Relationships of donated breakup objects, and the Plitvice Lakes' wooden walkways across cascading waterfalls 90 minutes away.
Plitvice Lakes at peak waterfall flow with the spring melt, Zagreb terraces along Tkalčićeva Street full, and the Dolac market at peak produce.
Plitvice at peak crowd density (book early), Zagreb hits 30°C but the Upper Town stays pleasant in evening shade, and INmusic Festival on Lake Jarun mid-June.
Plitvice autumn colour reflected in turquoise lakes considered the most photogenic season, Zagreb's chestnuts turning, and the Vukovar wine harvest in Slavonia.
Zagreb Christmas market voted Europe's best multiple years through Advent, Plitvice in winter snow accessible but with shorter walks, and the Sljeme ski runs above the city.