I tried tightrope walking, and it was terrifying.
21:21
I have no athletic skills. I tried parkour.
20:06
We drove from Pratt's Bottom to Balls Cross.
42:28
Source to Sea down the River Thames WITHOUT Leaving it
29:02
The largest telescope that will ever be built*
6:46
How to Walk on a Wire for Beginners! ::Wire Walking Basics::
27:20
Why Don’t Railroads Need Expansion Joints?
3:14:33
World Record Longest Slackline Attempt
30:09