Caves & the Underground

Caves & the Underground is a series that takes you on a journey through (so far) three caves of the United States. Marengo Cave in Marengo, Indiana; Seneca Caverns in Bellevue, Ohio; and Olentangy Caverns in Delaware, OH. Marengo Cave features natural formations that have been shaped by thousands of years of geological processes. Seneca Caverns in Bellevue, Ohio, has a fascinating underground world that has been hidden from human eyes for centuries. And Olentangy Caverns, easily the most accessible of the three with some of the most extreme lighting.