Phong Nha CAveMarch 2015
Phong Nha-Ke Bang National Park in central Vietnam was created to protect part of the biggest limestone (karst) region on Earth. It’s home to some of the planet’s largest caves---one of which, Phong Nha, is easy to visit by boat. Gliding along the cave’s river, we marveled at the massive, colorful, intricate shapes formed over millennia by water dripping through the porous rock. Beautiful karst formations were visible above ground, too: We had good views of the limestone hills as we drove through the park and as we hiked along the bamboo boardwalk of the Nuoc Mooc trail.