I love Janet Echelman's floating alien sculptures. I want them to be everywhere, like otherworldly guardians of the night. Urban skies -- devoid of stars thanks to light pollution -- are a lot more beautiful with these stunning nebulae in them.
There's a Kickstarter campaign to collect funds to build a new 700-foot long floating sculpture in Vancouver, her largest yet. This is a computer simulation:
And these are some of her sculptures around the world: