You should never BASE Jump. It is one of the most genuinely dangerous sports on the planet. But with that out of the way, you should definitely learn all about this pastime where people jump from tall structures and outcroppings for fun and thrills.
After her daughter and husband died, heiress Sarah Winchester became obsessed with the idea that spirits haunted her and to appease them she had to have a house continuously built for them. So she did - 24 hours a day for 38 years.