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From the Hawaii World / Places
Hanauma Bay
Hanauma Bay is a protected marine bay inside an old volcanic crater on Oʻahu. Reef viewing and coastal scenery draw visitors, but conservation rules shape the visit.
Why go
The curved tuff-ring walls make the geology as visible as the marine environment. The bay has experienced heavy visitor pressure, making its protected reef a place to observe carefully. Stay off coral and let posted ocean conditions govern any snorkeling.
What to look for
A curved volcanic rim surrounds the bay.
Reef habitat lies in the protected water.
Useful to know
Check current entry and reservation rules.
Avoid standing on coral and follow posted marine guidance.
Your next visit
Estimated · Declared scenario and planning estimates; no live opening, weather, queue or booking service.
Outdoor visit · 30–45 min
World planning estimate; admission, opening, visit duration and access need checking.
Photo gallery 2
Original World content and translations, shown as supplied. Practical information may need updating.
Hawaii / Tours & Travel
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