EXCLUSIVE PHOTOS - Angelina Jolie Wears Engagement Ring On Pre-Wedding Vacation

The Brangelina clan toured the Galapagos Islands on a private, chartered boat for two days before returning to the main island of Santa Cruz.

The whole family went along for the adventure -- Maddox, Pax, Zahara, Shiloh, Vivienne and Knox. The Ecuadorian islands are famous for their biodiversity and rich ecosystems -- there's wildlife there that can't be found anywhere else on the planet. The Galapagos tortoise is the most famous -- and is the islands' namesake -- there is a huge population of sea lions, iguanas and even penguins.

You can bet the Jolie-Pitts saw it all -- and added another stamp to their already-full passports before jetting off on Saturday.

We spotted Angelina wearing her ring -- as is visible in our photos of her and Brad on the way to their airport to catch their private jet -- a Gulfstream V.

Bon voyage!