This is Salesforce Park. It's a 5.4 acre roof top park made for public use. It sits atop the Salesforce Transit Center buildings (as well as a few others). I think this is brilliant.
This is Hang Én Cave, located within Phong Nha-Ke Bang National Park in Vietnam. It's listed as the third largest cave in the world. You can camp there on the sandy beach. Wow is all I have to say.