Rivers under limestone, ceremonial chambers, and cool dark air.

Actun Tunichil Muknal (ATM Cave)

The one everyone remembers. Guided only, no cameras, wet-foot entry, and a chamber of Maya ceremonial pottery and a mineralized skeleton called the Crystal Maiden. Ankle-strong footwear, comfort with swimming short stretches, and no fear of tight spaces required.

Barton Creek Cave

Canoe-only, calm, and family friendly. A more relaxed alternative to ATM with intact ceremonial artifacts still visible on ledges above the water.

Cave Tubing (Caves Branch River)

Float a river through a series of limestone caves in an inner tube. Popular add-on to Altun Ha or ziplining. Skip in high water; check with your guide.

Rules that actually matter

Don’t touch artifacts. Don’t step outside marked paths in ATM. Don’t enter caves without a licensed guide. These rules protect a resource that’s already lost pieces to careless visitors.