national monument in southwestern South Dakota, U.S., 15 miles (24 km) west of Custer. Established in 1908, it occupies an area of 2 square miles (5 square km). The principal attractions are its limestone caverns, a series of chambers joined by narrow passages. The known length of the caverns is 77 miles (124 km).
JEWEL CAVE NATIONAL MONUMENT
Meaning of JEWEL CAVE NATIONAL MONUMENT in English
Britannica English vocabulary. Английский словарь Британика. 2012