CaliforniaMama • Feb 9, 2012 9:48 am

[SIZE="1"][FONT="Verdana"]Hidden in rugged Phong Nha-Ke Bang National Park near the border with Laos, is
Hang En, a cave tunneled out by the Rao Thuong River, Vietnam. It is a mile-long portal that tunnels beneath a ring of mountains into the lost world of a network of 150 or so caves in the Annamite Mountains. [/SIZE]
From the National Geographic story Conquering an Infinite Cave
Photograph by Carsten Peter[/FONT]
[FONT="Times New Roman"]There I go, time travelin' again. :rolleyes:[/FONT]