View of Nile River from Aswan High Dam on a sunny day, Aswan, Egypt, Africa

The north entrance of the historic Johnson Canyon Railroad Tunnel, Kaibab National Forest of Arizona, USA

A water leak from a crack in Stone Dam in the Kaibab National Forest, Arizona, USA

Super Trees in Gardens by the Bay, Singapore

Windmills. Spain.

Windmills. Spain.

Windmills. Spain.

Windmills. Spain.

Alignment of wooden piles planted in the sand to disperse the energy of the swell and favor the return of sediments, winter, Opal Coast, France

Plantation avalanche protection in Oisans, Ferrand Valley, Ecrins NP, Oisans, Northern Alps, France

Plantation avalanche protection in Oisans, Ferrand Valley, Ecrins NP, Oisans, Northern Alps, France

Alignment of wooden piles planted in the sand to disperse the energy of the swell and favor the return of sediments, winter, Opal Coast, France