Paradise Ice Cave is a glacier cave located on Mt. Rainier's Paradise Glacier in the United States, and is thought to be the longest glacier cave in the world.[citation needed] Mount Rainier is a stratovolcano (and national park) located 54 miles (87 km) southeast of Seattle, Washington in Pierce County. ... The Paradise Glacier is actually a scattering of glaciers and snowfields on the southeast flank of Mount Rainier in Washington. ...