Found 2 places
Address: 101 Stoudt Rd, Hummelstown, PA 17036
Latitude: 40.2997 (40°17′59″N), Longitude: -76.7181 (76°43′5″W)
Address: 368 Middletown Rd, Hummelstown, PA 17036
Latitude: 40.2537 (40°15′13″N), Longitude: -76.7168 (76°43′0″W)
Site: indianechocaverns.com