Daphne Mayor is with a size of 0.32 sq km the bigger of the two Daphne islands (Daphne Minor – 0.07 sq km) lying some 10 km in the west of Seymour. While the smaller one is not open to visitors, you can explore the bigger hiking up a quite steep trail to its 120m high summit. At the top of the cone two small craters form the nesting place for hundreds of blue footed boobies. Nazca boobies nest on the crater rims and with a bit of luck you can also observe red billed tropic birds nesting in the crevices of the steep rocky cliffs of the islands.

Landing on the islands rocky cliffs is quite difficult and due to the fragile and eroded slopes the national park authorities have limited the visits to this island.