Enchanted Rock is a HUGE rock raising itself up right out of the Texas Hill Country, not too far north of where I live in San Antonio. My husband and I like to go up there and hike to get conditioned for our mountain hiking in Colorado. Course, its not the same, but it is very steep, and it does take the wind out of ya if you scramble up it fast. There's a several mile trail around the rock with a final ascent to the top. I really love going there, and we go pretty often.
After the hike, we go into Fredericksburg, Texas, a little charming German town close by and have German food and a German beer :) Makes for quite the date.
Here's a couple more pictures of the Enchanted Rock.