President Obama spent the day in Denver where he found himself shaking hands with someone wearing a horse head. Then things got a little weird.

+ Dubai’s plans for a 48-million square foot indoor city. (Suggested name: The Ass-trodome.)

+ Two dozen people offer you their best advice on how to invest a single dollar.

+ Let’s take a first-person trip down the world’s tallest waterslide. (For those who were rooting for Brazil yesterday, this will feel redundant.)