5-Day Northern Islands: South Plaza's Hybrid Iguana

Most Galapagos itineraries begin here. Baltra's airport is the world's first fully ecological airport, run on solar and wind power and built largely from recycled materials, including old oil pipes repurposed into the terminal structure. Land iguanas, wiped out here by the 1950s and reintroduced through a decades-long breeding program, now number in the hundreds again, some right around the airport grounds. From the terminal, a short bus transfer brings you to the pier for the panga ride out to your ship.

Up in the cool, misty highlands of Santa Cruz, a short walk brings you among wild giant tortoises moving through the undergrowth on their own terms. No fences, no enclosures, just several-hundred-pound reptiles going about their day. This is one of the best places anywhere in the islands for that encounter, and the surrounding vegetation is good habitat for several of Darwin's finches, heard as often as seen.

A dry landing sets you down on North Seymour's flat, sun-baked terrain, and the trail wastes no time getting to the action: magnificent frigatebirds display from low shrubs right along the path, males inflating their scarlet throat pouches into balloons to catch a female's eye. Blue-footed boobies are a near-constant presence along the same stretch, and during the breeding season you may catch their high-stepping courtship dance just a few feet from the trail, showing off the bright blue feet that give the species its name. Land and marine iguanas share the coastline as the trail loops back toward the water, and sea lions haul out along the shore. Keep an eye on the cliffs above the surf too, where swallow-tailed gulls sometimes perch between flights out to sea.

A tiny, flat islet of white coral sand between North and South Seymour, Mosquera is best known for its resident sea lion colony, sprawled across the beach for much of the day. Shorebirds and lava herons work the shoreline fairly reliably, and sharks and rays are a possibility for anyone snorkeling or diving nearby.

Darwin Bay sits inside the flooded caldera of Genovesa, and a wet landing on its white coral-sand beach puts you right in the middle of a working seabird colony. Great frigatebirds display along the shore, males inflating scarlet throat pouches to catch a female's eye, and red-footed boobies nest low in the surrounding trees and shrubs, unusual for a booby. Nazca boobies are just as much a fixture here, while blue-footed boobies are a rarer, luckier sighting. Swallow-tailed gulls and red-billed tropicbirds work the cliffs nearby. If you're a confident swimmer, the bay's calm water is a good place to snorkel or kayak afterward, with a chance of white-tipped reef sharks and sea turtles along the rocky shore.

A stone stairway carved into the cliff climbs to a wide plateau holding one of Genovesa's largest seabird colonies. The trail passes through a small Scalesia forest, home to the short-eared owl, one of the few predators on the island, before reaching cliffside colonies where Nazca and red-footed boobies nest side by side, frigatebirds wheel overhead, and thousands of storm petrels dart in and out of cracks in the lava. A small colony of fur seals sometimes gathers near the landing. Red-footed boobies nest in only a handful of places across the archipelago, and this is one of them.

A short landing puts you immediately among sea lions and the endemic Plaza land iguana, smaller and more golden than its relatives elsewhere. Watch closely and you might spot a rare hybrid, the result of an occasional cross between a marine and a land iguana found only here. The trail crosses a carpet of succulent Sesuvium, red for part of the year, studded with Opuntia cactus. Along the cliffs, swallow-tailed gulls nest on the ledges beside red-billed tropicbirds, and frigatebirds circle overhead as the loop returns to the landing.

Formed by geological uplift rather than volcanic activity, Santa Fe is unusually flat for a Galapagos island, and it's the only place on Earth with its own endemic subspecies of land iguana. After landing in clear, turquoise water, a walk through a forest of giant, tree-sized Opuntia cactus leads to iguanas basking beneath them. The Galapagos dove is a reliable sight along the trail, and with some luck you may also spot the Galapagos snake or the Galapagos hawk.

Also known as Witch Hill, Cerro Brujo greets you with towering cliffs before the dinghy even reaches the beach. Once ashore, you can relax alongside the sea lions, snorkel straight from the sand, or walk to a hidden lagoon where shorebirds work the shallows. Blue-footed boobies, swallow-tailed gulls, and marine iguanas are often somewhere along the shoreline and cliffs too.

The transfer back is the reverse of the arrival: a panga ride from your ship to the pier in Puerto Baquerizo Moreno, then a short drive to the airport, which sits right next to town. Keep an eye out for sea lions and marine iguanas near the runway on the way in, one last sighting before you fly out.