A DC metro poster has..................nat. parks can be above ground.......or below.............with a pic of the Jefferson memorial and one beneath of it of stalactites...........the kind u would see at Luray caverns in Virginia..........



Beneath the narrow mouth of the cenote, the walls opened up to become a giant dome, cathedral-like except for the roots of trees grasping through the rock for the water. Focused by the small opening—shaped into a rectangle likely to mirror the four-cornered Maya cosmos—the shaft of sunlight danced like fire on the delicate frillery of surrounding stalactites. The edge of the water too seemed to ignite when it was hit by the light, and beneath the normally dark surface the waters turned a transparent turquoise blue. The sun’s rays came so close to vertical that Montero now knew that yesterday, at the zenith moment, a pillar of light would have plunged straight into the water. One didn’t have to be Maya to feel awe.