The National Geographic Travel Photographer of the Year Contest is open to submissions until the end of this week, June 30. The grand-prize winner will receive a 10-day trip for two to the Galápagos Archipelago with National Geographic Expeditions. National Geographic was again kind enough to allow me to share more of the entries with you here, gathered from three categories: Nature, Cities, and People. The photos and captions were written by the photographers, and lightly edited for style.