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Ontario, California - Wikipedia
THE 15 BEST Things to Do in Ontario - Tripadvisor
15+ Thrilling Things To Do in Ontario, California (For All Tastes)
Facts & History | City of Ontario, California
30 Fun Things to Do in Ontario, California - Destguides
Ontario (California) – Travel guide at Wikivoyage
Ontario, California - Wikiwand
Visit Ontario | City of Ontario, California
Ontario | Desert City, Mojave, Oasis | Britannica