The Galapagos Islands are off the coast of Ecuador. We think the best way to see the islands is by cruise boat. No large cruise ships can visit the Galapagos, they are capped at 100 passengers. There are a mix of expedition-style ships and luxury ships.
The islands are highly regulated by the government with limits on the number of people at shore and requirements to visit certain areas with a naturalist guide. You must fly out to the Galapagos islands and join your ship there.
We enjoyed learning about all the wildlife and always chuckled when the common name of a species started with the word Galapagos, because that animal is ONLY found there!