A miner adjusts his helmet inside a salt mine, where construction is underway to build the 700 km long SuedLink electric power line to transport 'green energy' from wind turbines in the northern coast to the country's south due in 2028, at the Suedwestdeutsche Salzwerke salt mine in Heilbronn, Germany, September 12, 2023. Photographer Kai Pfaffenbach had an insight into two rarely seen worlds when he went more than 200 meters (660 feet) underground to see the construction of the SuedLink electric power line. Intended to play a key part in Germany's energy transition, the 700-km (430-mile) SuedLink will transfer green energy, connecting wind power from the north with consumers in the south. "Getting there was a real adventure itself," recalled Pfaffenbach. "Medical checks and a special security training were mandatory before I could join a small group of journalists entering that high-speed elevator all covered in salt dust taking us down more than 200 meters under ground level." REUTERS/Kai Pfaffenbach/ File photo