The caves, nicknamed the Marble Halls of Oregon are rare in North America.

Meanwhile, above ground, travelers are treated to views of the Siskiyou Mountains fromthe preserves various hiking trails.

On one of the monuments hiking trails, you might even spot some local wildlife.

Oregon Caves National Monument in Oregon

The strange cave formations of Oregon Caves National Monument in Oregon.Credit:fdastudillo/Getty Images

It is located 35 minutes east of the city of Cave Junction, on Oregon Route 46.