Their adventures have brought them to some of the most beautiful places on the planet — but they have also gained new insight into the status of the Earth today.
When the family was visiting Belize, for example, they came upon an island called Moho Caye. "It is a tiny island, about 8 acres, and has a caretaker living there full-time," Corbe said. "Where we landed, the beach is immaculate because he keeps it clean."
But then the family walked to the other side of the island.