We just got back from a GREAT VACATION! We toured the Georgia Aquarium and World of Coke in Atlanta, GA, Bob Jones University in Greenville, SC, and Samaritan's Purse in Boone, NC . We went gem mining for 2 days in Hiddenite, NC. Besides that, we visited Blowing Rock, Table Rock, Chimney Rock including Hickory Nut Falls, Grandfather Mountain, Linville Falls, and Mount Mitchell, NC. This included quite a bit of hiking and walking.
Keep in mind, if you look for mountains and waterfalls on state park and national forest websites, that they rate these places according to distance, time required and difficulty. Though I am somewhat overweight, I am not completely out of shape. Still, I felt that some sites tended to underestimate difficulty and time required.