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Hawaii

Second Cathedral (Lanai)

  • Max depth17 m (56 ft)
  • CertificationOpen water / no overhead

The dive

Like First Cathedral, this is a lava tube with skylights.

Profile and sections

Like First Cathedral, this is a lava tube with skylights.

Depth and profile
At ~17 m (55 ft): a cavern with a lava chute as exit and a shallower opening in the ceiling to enter again.
Configuration
Cavern with daylight and several openings: recreational gear (estimate).
Who can dive where
  • CaveAt least Open water / no overhead
  • Whole caveConfigurations: Backmount / twinset / Sidemount / CCR / Small cylinders / no-mount (speleo sumps)
  • Whole caveGoes down to 17 m (trimix or deco may be needed) · doesn't decide who may dive
Through a dive centre or guide

This is how the planner decides who in your team may dive this cave. Rules your own trip adds (organizer, a mail, the AI) show with your trip.

How to get there

Boat trip from Maui with a dive centre, usually together with First Cathedral.

Plan your route ↗

Around Second Cathedral (Lanai)

FillsNo fill station known nearby
Other sites1

Going to Hawaii with your team?

Marcel finds the sites that match your team's certifications.

Plan a trip
Something wrong, or do you know more?Depth, access, parking, the current situation: let us know.
Sources, sharing and disclaimer

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Certification requirements, configurations and trimix depths are estimates for planning. Always check them locally and dive within your training. Compiled from web research (Oct 2026): the websites of Jack's Diving Locker, Kona Honu Divers (Jan 2026), Dive Maui and Seasport Divers, information from Extended Horizons (e-mail, Nov 2026), and West Hawaii Today and Civil Beat (2017–2018) on the chamber. No site has a published pin. These are guided boat dives into lava tubes, caverns and arches; the requirements come from the dive centres. Certification and configurations are estimates.