Underground Granite Tunnel
A 5.5-kilometre underground granite tunnel originally excavated to divert water to the Idukki Dam. During drier months the interior is walkable, offering a rare underground adventure through solid granite accessible only via the Uluppuni 4×4 trail.
Key Features
Highlights
- 5.5km underground granite tunnel
- Originally built for Idukki Dam water diversion
- Walkable during dry season when water recedes
- Completely dark interior — a unique subterranean experience
- Only accessible via 4x4 jeep on Uluppuni trail
Accessibility
How to Reach
Underground Granite Tunnel is accessible only via a 4×4 jeep safari from Vagamon town. Regular vehicles cannot navigate the terrain. Book a private jeep with Team Soul — our expert local guides know every trail.
Starting point: Vagamon Bus Stand / your accommodation (pickup available)
Book This Experience
Recommended Package
Uluppuni Off-Road Expedition
Includes Underground Granite Tunnel + more stops
Visit with Team Soul
Underground Granite Tunnel
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Book a jeep to visit
Underground Granite Tunnel