"Before the pandemic … 95 per cent of our clientele was from the U.S.," said David MacLachlan, a partner at Lodge 88 on Esnagi Lake and the executive director of Destination Northern Ontario.

Why it's incredible: The lake is one of the largest on Earth, but it lies beneath several miles of ice. Lake Vostok is a giant lake in Antarctica that is similar in size to North America's Lake ...

Editor’s Note: Call to Earth is a CNN editorial series committed to reporting on the environmental challenges facing our planet, together with the solutions. Rolex’s Perpetual Planet ...