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Gigantis Tour

An Expedition for the Bold

For experienced explorers and thrill-seekers ready to push their limits, the Gigantis Tour offers the ultimate underground adventure at Bristol Caverns. This strenuous, off-trail expedition leads you to Gigantis, the largest known formation in the cavern—and the farthest accessible point for any tour.

This is not your typical cave walk. It’s a physically demanding trek through undeveloped terrain, with scrambling, squeezing, and navigating raw, untouched cave passages that few have ever seen.

What You'll Experience

Accompanied by expert guides, you’ll venture over ancient rockfalls, descend into rugged chambers, and weave around towering columns and deep chasms. If you’re up for the challenge, you can even take the serpentine alternate route—a narrow, winding path that adds an extra edge to your journey.

Highlights include:

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Exclusive access to the cavern’s most remote areas

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A rare up-close view of Gigantis, Bristol Caverns’ largest formation

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A chance to crawl, climb, and conquer real cave terrain

This tour is raw, real, and unforgettable.

See Gigantis
Q

A visitor stands beneath Gigantis, a towering stalactite and flowstone formation on the Gigantis Tour at Bristol Caverns, dramatically lit to reveal its massive scale and intricate textures inside the underground chamber.

You’re not going to believe what it looks like in person!

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Tour Details

Duration

2.5–3 hours

Age Requirement

16+

Schedule

Twice daily at 10:00 AM and 2:00 PM
(excluding Sundays)

Difficulty

Strenuous (9/10)

Group Size

Small, for safety and intimacy

Cost

$99.95 per person

Narrow tunnel deep inside Bristol Caverns on the Gigantis Tour, with a bright headlamp light beaming through the rocky passageway and illuminating the rough cave walls.
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A caver wearing a headlamp crawls through a narrow passageway inside Bristol Caverns during the Gigantis Tour, showcasing the tight spaces and adventurous nature of this underground experience.

What to Bring

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Water Bottle – Stay hydrated during your physically intense journey

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Climbing Gloves – Highly recommended for grip and comfort
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High-Powered Flashlight or Headlamp – Required (bring your own; rentals not available)
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Clothes That Can Get Dirty – Jump-suits available for rent
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Helmets with Headlights and Gloves – Provided free of charge

Important: This is an advanced tour with physical challenges. Guests must be in excellent health and able to maneuver through narrow passages, climb over rocks, and handle strenuous activity in a remote environment.

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Three cavers wearing helmets and headlamps stand at the base of Gigantis, a massive flowstone and stalactite formation inside Bristol Caverns, highlighting its immense scale and intricate cave textures.

Is This Tour Right For You?

Standing in front of the colossal “Gigantis” formation (left), these cavers look miniature by comparison. Towering high above the cave floor, Gigantis lives up to its name as one of the largest and most awe-inspiring natural features in Bristol Caverns.

Can you see yourself standing here?

Gigantis Tour is designed for caving enthusiasts, seasoned adventurers, or those seeking the most extreme Bristol Caverns experience available. If you’re up for the physical and mental challenge, this tour will reward you with awe, achievement, and a story few others can tell.

Call us at (423) 878-2011 to learn more and check availability.

Schedule Your Adventure!

Frequently Asked Questions

Have a question about the tour that doesn’t appear below?  We’re glad to answer!  Contact us and ask.