These two unbelievably blue lakes in Northern California are the best destinations for families who enjoy paddling, swimming, ...

Tourism — and more importantly, our approach to preserving what makes this place special — has come a long way in the past 50 years.

Clear Lake, one of California's most visited lakes, has turned cloudy and green amid an algal bloom that can threaten wildlife and tourists. See the photos.

Algae blooms in Clear Lake have turned the Northern California lake so green the hues are visible from space, NASA satellite photo shows.

Algae blooms in Clear Lake have turned the Northern California lake so green the hues are visible from space, NASA satellite photo shows.