Hashima Island, Nagasaki, Japan. This former coal mining facility once housed thousands of workers during the industrialisation of Japan. Tall concrete apartment complexes were built to pack workers onto the small island, and a large seawall was built around it to protect against tsunamis. As petroleum replaced coal, the island was eventually completely abandoned.
Every year Austria’s Green lake undergoes a dramatic transformation. During the winter months, the lake is only around two metres deep, but when the ice melts and flows down from the nearby mountains in the summer, the water level rises to over ten metres. A popular park for hiking becomes a unique destination for divers.