It's a marvel of a monument. Nice area to just han...

It's a marvel of a monument. Nice area to just hangout, enjoy the view with the mighty Mississippi in the foreground. The museum is free but the cost of a trip up the arch is pretty steep. If you're gonna do it, might as well get the package deal with the ferry ride and all that, not much difference in price but would be more worth it than just the trip up, in my opinion.