Discover the Marble Halls of Oregon
Nestled deep inside the Siskiyou Mountains, the caves formed as rainwater from the ancient forest above dissolved the surrounding marble and created one of the world's few marble caves. The highly complex geology found on the Monument contributes to the unusual and rare plants and animals found nowhere else but here. Experience the extensively decorated and adventurous "Marble Halls of Oregon."
Did You Know?
Oregon Caves offers a physically and mentally challenging off-trail cave tour where you learn caving techniques, etiquette, and conservation while slithering through concealed parts of the caves. Reservations are required and is a tour only offered during the summer months. More...