Those photos are so cool, Ling!
Here's some street art and sculptures I've encountered in my recent explorations.
The eye stencils are on a particle board wall hiding construction next to a side walk, and the rest are in sculpture parks. The bunnies, birdboy and helmet are from the St. Louis City Garden, and the eyeball and tree roots are from Laumier Sculpture Park.
And while I'm at it, I'll talk about/show pictures of where I went for my birthday a few months ago! The St. Louis City Museum is this super cool building full of donated architecture assembled into this really cool tactile experience. There's a series of indoor caves to explore:
And within those caves are these sort of tunnels made of bars that you can climb up into and stand above everyone:
(hard to tell, but I'm about 8+ feet up)
Lots of pretty decor:
A "skateless skate park" consisting of skate ramps that you run up (didn't get a picture, but I still have a scar on my ankle from where I fell and skidded down), a ten story slide (plus a lot of smaller ones), a ferris wheel on the roof, an old schoolbus hanging off the edge of the roof that you can go inside, plus... this:
(not my photo)
Basically what it would be like if the play area at a McDonalds was made huge and scary and out of iron. Tons of tight winding spiral staircases, catwalks, ladders, tunnels made of bars (note the people in the curved tunnel near the top), and two little old airplanes you can go into. It's huge and fun and a little bit scary (I was up there on a breezy night - things shook a little bit)
The coolest thing about it is that they're constantly adding onto it. The building it's in is ten stories high, but only three have development in them yet. They're going to fill that building over time. They're currently building a castle from huge stones donated from a home that's to be demolished.
And since I can't hope to cover every neat little thing it has,
here's the google image search results, which show a lot more. Forget the arch, if you're ever in Saint Louis,
go to the City Museum.