Dark Clouds - 11 photos of dangerous skies

Dark and heavy clouds are always an amazing sight. I absolutely love them. It doesn't matter if you are at home or on vacation, they are always jawdropping and of course worth a shot. The photos I want to present in this month's gallery were taken over the past years at locations around the globe with various gear, including my iPhone 5.

Enjoy a collection of the most intense skies I've experienced so far.