In 1463, the last Bosnian king was crowned in Jajce, and within months the fortress fell to Ottoman forces, closing a chapter of medieval sovereignty. The town sits at the confluence of the Pliva and Vrbas rivers, where a twenty-one-metre waterfall crashes into the Vrbas channel directly beneath the old town ramparts — a geographical oddity that made Jajce both defensible and hydraulically vital. The cataract powered grain mills for five centuries, and the stone watermills along Pliva Lake remain intact today, their wooden paddle wheels still turning in the current. Jajce's strategic position at the frontier between Catholic and Ottoman Bosnia left a dense archaeological record. The Mithraeum — a subterranean temple to the Roman sun god — lies beneath the citadel, one of fewer than twenty intact mithraea in the Balkans. The catacombs, hewn from limestone in the fourteenth century, house the remains of local nobility, their vaulted ceilings marked by heraldic motifs and Cyrillic inscriptions. Above ground, the Bell Tower of Saint Luke stands as the only Gothic belfry in Bosnia, its octagonal form influenced by Dalmatian coastal architecture. The fortifications themselves are a palimpsest: Roman foundations, medieval curtain walls, and Ottoman refurbishments layered across eleven centuries. Central Bosnia heritage tours from Sarajevo pair Jajce with Travnik, the Ottoman provincial capital thirty kilometres east. The two-hour drive follows the Bosna River valley through forested karst terrain. Most itineraries allocate three to four hours in Jajce, sufficient for the fortress walk, waterfall viewpoint, and a circuit of the Pliva Lakes. The watermills — wooden A-frame structures with shingle roofs — cluster along the lake's western shore, connected by a boardwalk that traces the original millrace channels. Several have been converted to cafes, but their grinding mechanisms remain visible through glass floor panels. Jajce's inscription on the UNESCO tentative list in 2006 recognised both its natural amphitheatre setting and its role as a Second World War political landmark: the Anti-Fascist Council convened here in 1943 to establish the federal structure of post-war Yugoslavia. The assembly hall, preserved in socialist-era condition, occupies a Habsburg-era school building near the waterfall. Visitor numbers remain modest outside summer months — fewer than fifty thousand annually — and the town's compact old quarter, enclosed by intact medieval walls, retains a working-community atmosphere absent from more commercialised heritage sites.