The best site for skydiving is United States Parachute Association. They have everything you need to get you closer to your dream. If you're looking for skydiving in a particular area check out the drop zones list on their site and it will help you locate skydiving providers.
 

USPA

Drop zone

Skydiving info

Base jumping

Base Jumping

Base Jumping Movies

Angel Falls

Joseph_Kittinger
"Longest and Highest Freefall in the world"
August 16, 1960 he jumped from an altitude of 102,800 feet. Freefell for 4½ minutes and reached a speed of 614 mph before opening his parachute at 18,000 feet. That was the real skydiving world record.