Explore nature's masterpieces with our guide to seven spectacular crater lakes with breathtaking views and fascinating ...

Other must-visit spots here include Bartolomé Island, Quilotoa Lake, Mindo Valley, Middle of the World City and Parque Nacional Yasuní national park. One review on TripAdvisor wrote of Ecuador ...

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 ...