I'll deal with the former in a future post, but I thought I'd show some of the latter images we saw during our trip. All were from the "101" district in the core. The second image was constructed with what looked like sequins to produce the "mountain top". In a light breeze, the top shimmered, a very nice effect (there was a second piece about a block away from that one, which I presume was done by the same artist).
The top of the mountain is constructed of a series of sequins. I was looking at some Flipboard sites tonight and found an article on the artist -- see "Shimmering Sequins Street Art".