Mount Michael is an active volcano with a height of 843m. It is located on Saunders Island in the South Sandwich Islands, a British Overseas Territory in the southern Atlantic Ocean. It is one of the few volcanoes in an overseas territory of the United Kingdom. The volcano was discovered by a British expedition under James Cook in 1775, but was presumably first charted in 1820 by a Russian expedition under Fabian Gottlieb von Bellingshausen. It was recharted in 1930 by DI personnel under Commander W.M. Carey of the Royal Navy, who was captain of the Discovery II at the time of the survey.

In 2019, it was discovered that Mount Michael had a persistent lava lake, a rare phenomenon which is only known to occur at eight volcanoes in the world.^[1][2] In November 2022, an expedition from University College London led by geologist Emma Nicholson reached the summit of the volcano and was able to confirm the existence of the lava lake.^[3]