Is there a way to get from Phong Nha to Hue that makes a stop at the Vinh Moc Tunnels? I heard there may be a bus?
what about going from Phong Nha to the tunnels, then to Dong Ha after for our onward journey? I.e. if we don't want to go to Dong Ha, then back up to the tunnels and back down to Dong Ha (saving some travel time)?
