I've done a lot of shore excursions across French Polynesia, some brilliant and a few forgettable, so I have opinions. The trips that stay with me are almost always the ones in or on the water, which makes sense in a place where the lagoon is the main event. Tahiti and Bora Bora each reward a different kind of day ashore, and knowing that ahead of time helps you choose well. Here are the outings I'd happily repeat.
The lagoon tours in Bora Bora
If you do one thing in Bora Bora, make it a lagoon tour. The classic version takes you to shallow spots where rays glide right up to you and reef sharks patrol just beyond, and despite how that sounds it's calm and well guided. I've taken first-timers who were nervous in the morning and grinning by lunch. Bring reef-safe sunscreen and a waterproof way to carry your phone, because you'll want photos and the small boats get splashed.

Into the interior on Tahiti and Moorea
The high islands hide a green, mountainous heart that most visitors never see. A 4x4 trip up into the valleys of Tahiti or Moorea takes you past waterfalls, old plantations, and viewpoints over the lagoon that you simply can't reach from the beach. It's bumpy and sometimes muddy, so wear shoes you don't mind dirtying. This is the excursion I recommend to people who think they've already seen the islands from the water.
A motu day done right
A motu is a small reef islet, and a half-day on one is the South Pacific at its simplest: warm shallow water, shade, and not much to do but swim. The ship's own Motu Mahana off Taha'a is the standout, with a floating bar and a barbecue ashore. Excursion line-ups and prices shift between seasons, so confirm what's running when you book rather than counting on a specific outing being available.

Frequently asked questions
Are the stingray and shark tours safe?
They're among the most popular outings for good reason and are run by experienced local guides. Follow the briefing, keep calm movements, and you'll be fine. Let your guide know if you're an anxious swimmer.
Should I pre-book or decide onboard?
Popular water excursions can fill up, so I'd reserve the ones you care most about early. You can usually still arrange others once aboard, but availability and pricing vary, so confirm at the time.
What should I bring ashore?
Reef-safe sunscreen, a hat, water shoes for rocky entries, and a dry bag for electronics. On 4x4 trips, closed shoes and clothes you don't mind getting muddy.
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