
Ključ Castle
Gacko Municipality, Bosnia and Herzegovina
Medieval castle in Gacko, Bosnia and Herzegovina. It lies in Herzegovina, the country's hot, dry, Mediterranean-leaning south — best visited outside the midsummer peak.
Why visit: Medieval Bosnian and Ottoman fortresses on river bluffs, many still commanding their old crossings.
- ›Walk the ramparts
- ›Take in the view over the river or valley
- ›Explore the inner keep
- ›Learn the fortress's medieval and Ottoman history
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Best time
April – October (clear views from the walls)
Weather
Mediterranean-influenced Herzegovina — very hot, dry summers (30–36°C) and mild, wet winters (5–12°C); shade and water matter in July and August.
Entry fee
Small entry (~₹150 – 500)
Hours
Typically 9 AM – 6 PM (shorter in winter)
Est. budget
₹600 – ₹2,000
Duration
1 – 2 hours
Nearby attractions

Sutjeska
Republika Srpska
River in Bosnia and Herzegovina. It lies in Herzegovina, the country's hot, dry, Mediterranean-leaning south — best visited outside the midsummer peak.