Hidden Cities ARCTIC OCEAN Montréal Canada EUROPE NORTH AMERICA ATLANTIC OCEAN PACIFIC OCEAN AFRICA SOUTH AMERICA ATLANTIC OCEAN SOUTHERN OCEAN 4
Can a city be a secret It can if it is built underground Underground cities are hiding all over the world Let's explore Kaymaklı and Derinkuyu Turkey Beijing China ASIA PACIFIC OCEAN Petra Jordan INDIAN OCEAN AUSTRALIA 5 ANTARCTICA
RÉSO The city of Montréal Canada has a secret It’s on top of an underground city called RÉSO Canada Montréal Lake Ontario United States of America Atlantic Ocean 6