Now abandoned and uninhabited, Simushir is home to four notable volcanoes. Milna is the tallest, rising to 5,050 feet (1,540 meters), and last erupted in 1914.

A defunct Soviet spacecraft, Kosmos 482, is expected to fall back to Earth between May 8-12, 2025. Launched in 1972, the Venus-bound craft malfunctioned and has been orbiting Earth for 53 years.