Bartolome moon landscape, nicest scenery of all islands
Isabella Tagus cove: nice view of a lake above the sea;
Urbina bay: good snorkeling possibilities, giant tortoises, land iguanas, Galapagos penguins
Fernandina Punta Espinosa: beautiful lava formations, marine iguanas, flightless cormorants, fur seals
Santiago Puerto Egas: birds, sea lions
Rabida good snorkeling possibilies, green sea turtles, sea lions
Santa Cruz Charles Darwin Reaserch Center
San Christobal nicest beach (playa Ochoa), sea lions, Kicker rock
Espanola

Punta Suarez: albatrosses, marine iguanas, masked boobies
Gardner bay: sharks

Seymour blue-footed boobies, frigatebirds

itinerary we recommend an 8 day trip and a good, small boat (for example the Coral) that is able to reach the further outlying islands like Isabella and Espanola
if you don't have the time to do a full trip, be aware that the north-west islands have mainly reptiles and the south-east islands have more birds
water temperatur it is cold, very cold (16 - 18 degrees celsius), but once you see the first animals in the water you forget about it