I've never been to KSC. I've been to Houston a few times. I couldn't imagine trying to have a Saturn V permanently standing would be an easy feat with both locations susceptible to hurricanes and tornadoes. Walking the length of it is still pretty impressive.

I come from a construction family, so I'd put some of the famous sky scrapers in that category too. Especially thinking about the crazy beam walkers like that famous photo of the guys riding the I-beam up eating their lunch on the way up.