An absolutely stunning timelapse photo by Mostafa Hamad. It is composed of 5000 photos taken within 48 hours.

Duncan Murrell aka "Whaleman" has been taking intimate close-range photos of whales for 20 years. He takes a small craft out every summer, tracking the whales as they hunt for food, and paddles up to 30 miles a day. These amazing shots were taken in the Tenakee Inlet in Southeast Alaska.

The Son Doong Cave in Vietnam is the world's largest cave. It is so large that there's a forest inside of it. Here are some amazing photos of the cave taken by Carsten Peter.

Catherine Nelson is a self-proclaimed "painter with a camera". These gorgeous worlds, which take nearly a month to create, are stitched together using hundreds of photos. Although they are assembled digitally, each piece is almost purely based in photography. 

Elena Shumilova is an incredibly talented photographer who knows all the right ingredients for taking a beautiful photo. Her winter photos perfectly capture innocence, youth and wonder. Check out more of her fantastic photos on 500px.