And the world’s best zoo is …

Story highlights

TripAdvisor announces awards for world's best zoos and aquariums

U.S. dominates with nine of top 25 zoos and 10 of top 25 aquariums

Henry Doorly Zoo in Omaha, Nebraska, is picked as world's best zoo

Awards based on "millions" of reviews from TripAdvisor users

CNN  — 

What makes a zoo or aquarium outstanding?

Exotic animals?

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Prince George visits Australian zoo
03:35 - Source: CNN