If you are in the region then you have to visit the Cango caves. The caves are 29km from Oudtshoorn, at the start of the Cango Valley. The caves are situated in a limestone ridge which runs parallel to the well known Swartberg Mountains. Here you will find the finest dripstone caverns, with their vast halls and towering formations.
Cango Caves is the only show cave in Africa which offers a choice of Standard (easy) or Adventure Tours. All tours are lead by experienced, knowledgeable and accredited Caves Guides. All tours are offered in English but Afrikaans, German, French and other language guide may be available (please check guide availability when making reservations).
You can only visit the first three chambers if I remember correctly on the normal tour, but if you take the adventure tour which takes you deeper into the caves
You can drive to Oudtshoorn for the day and visit the ostrich farms, Kango caves, Crocodile farm. You can even go camel riding here. Lots of things to see and do in Oudtshoorn and it is only 40 minutes drive away.
Check out this site for some excellent info. on hikes in the George area and surroundings.
With it's great climate, and beautiful settings, the Garden Route makes for some wonderful hiking.
Only a 20 minute drive away, will get you to Mosselbay where you can visit the Diaz museum complex and many other things.
The Outeniqua hiking trail starts at Witsand just outside of George. It can be a one to seven day hike through magnificent scenery.