Sunlight streams into Grubug Cave in Indonesia in this National Geographic Photo of the Day from the 2015 Traveler Photo Contest.
Source: Grubug Cave Image, Indonesia - National Geographic Photo of the Day
Sunlight streams into Grubug Cave in Indonesia in this National Geographic Photo of the Day from the 2015 Traveler Photo Contest.
Source: Grubug Cave Image, Indonesia - National Geographic Photo of the Day