The caves were carved by an underground river system approximately 500 million years ago.
The caverns were historically used as a refuge for the Wyandot people during the 1800s.
The site was once utilized as a hideout for local outlaws and a stop along the Underground Railroad, though evidence remains largely anecdotal.
The interior temperature of the caverns remains consistently cool regardless of external weather conditions.
The property is situated above the Olentangy River, which influences the ongoing geological changes in the area.
Olentangy Caverns is a limestone cave system in Delaware, Ohio, featuring three distinct underground levels accessible through guided tours. The caverns were originally formed by an underground river and were used by the Wyandot people for protection and shelter. The site includes a rock and gem gift shop, a treasure hunt mining sluice, and a petting zoo area. Visitors descend into the caves to observe subterranean geological formations and natural fissures. The attraction also features an outdoor maze and a miniature golf course situated on the property grounds.
The entrance area of the caverns provides the best contrast between the natural stone formations and the daylight.
Bring a light jacket as the temperature inside the caverns remains cool year-round.
Wear sturdy, closed-toe walking shoes with good grip to navigate the uneven underground terrain.
Complete the cave tour first before exploring the outdoor attractions to avoid peak mid-day heat.
Do not attempt the cave tour if you have severe mobility limitations, as the descent involves steep stairs and narrow, low-ceiling passages.
Operations are highly seasonal; the caverns are typically closed or offer limited access during the winter months.
Maintain proximity to your guide during the tour; do not touch the limestone walls or stalactites to prevent oil damage.
