The Short Version
The absolute claim that Zagreb's funicular is the "world's smallest" is directly contradicted by Guinness World Records, which recognizes the Fisherman's Walk Cliff Lift in Bournemouth (39 meters) as the world's shortest funicular — significantly shorter than Zagreb's 66 meters. Zagreb may hold a legitimate distinction as the shortest public-transport funicular, but the unqualified superlative is not supported. Multiple competing claimants to similar titles further undermine the assertion.