What are the tallest and steepest volcanoes?

The tallest volcano on Earth is Ojos del Salado, located on the Argentina-Chile border, reaching an elevation of approximately 6,893 meters (22,615 feet). The steepest volcano is considered to be the cone-shaped Mauna Kea in Hawaii, which has a steep slope angle but is primarily submerged underwater. However, if focusing solely on above-water volcanoes, the steepest is often cited as Mount Fuji in Japan. Both types of measurements highlight the impressive geological features of these volcanoes.