Foggy Bottom Metro station platform, part of the Washington D.C. metro system, Washington D.C., United States of America, North America

STEAG Evonik Walsum coal-fired power plant, Duisburg, Ruhr Area, North Rhine-Westphalia, Germany, Europe

Parking space for e-cars while charging at a charging station, Duesseldorf, North Rhine-Westphalia, Germany, Europe

Parking space for e-cars while charging at a charging station, Duesseldorf, North Rhine-Westphalia, Germany, Europe

Mountain railway glacier bus above the valley station of the Hintertux glacier, in the back the village of Hitnertux, Tuxertal, Tyrol

A technician at the foot of the station holds a large evacuation sock into which a person is lowered. Once a month, all the staff carry out an emergency evacuation of the station using a ?sock?. The idea is to let yourself slide down a tube of fabric that slows your fall to such an extent that you can even stop yourself by spreading your arms and legs. A technician is waiting for us at the bottom to assist with the last metre of the descent. Concordia Antarctic Research Station, Dome C plateau, East Antarctica.