La Cangrejo Waterall, a 30 metre waterfall emptying into a crystal blue lake.
Rocks in the Rio Blanco near Rincón de la Vieja National Park, Costa Rica.
La Oropéndola Waterfall cascades 25" meters to an emerald green pool below, near Rincón de la Vieja National Park, Costa Rica.
The sun dips below the horizon, marking an end of the golden hour.
The blue hour occurs after the sun has set. During this time, everything takes on a bluish hue.
This image was taken during the blue hour, just after the sun has set. But since it is a black and white image, it is aptly named the grey hour.