From
IMPORTANT:
Starting from September 1st 2021, all travellers of 12 years old and more are required to be fully vaccinated with proof of vaccination from one of the recognized COVID-19 vaccines.
So, please make sure to bring vaccine proof (2 vaccines) + an ID
Thousand Islands National Park
CN Tower
Ripley's Aquarium of Canada
Niagara City Cruises
Niagara on the Lake Heritage District
Concord Tours and Travel