What is the scariest kind of work you can think of? Well, if you're afraid of heights, then you can forget about sending your resume in for this gig.
For those who don't mind the mile drop, the pay’s good, you get great views of the city and constant challenges.
The world's tallest man-made structure is the 829.8 m (2,722 ft) tall, in Burj Khalifa in Dubai, United Arab Emirates. Imagine cleaning the windows on that one! Now that's got to be one hell of a life insurance plan!