I found this video on my friend Brynn's blog, and it is so crazy and cool. Here is what they said about it:
"In the city of Tarragona, Spain, castellers gather every two years to see who can build the highest, most intricate human castles. This uniquely Catalan tradition requires astonishing strength, finesse, and balance. Not to mention courage"
Whenever we make it to Spain, we will plan around going to this event (or the one where they throw tomatoes at each other - or the running of the bulls - all equally entertaining)