15 MOST SCARY Tourist Attractions Interesting! That's Crazy! Tourism is a vital part of many world economies, with as many as 1.3 billion people thought to travel internationally per year for leisure purposes. It’s, of course, a highly competitive industry, with cities and countries focusing not only on historical monuments to attract visitors, but also encouraging the development of new destinations to give them the edge over other places. Offering a wide range of different experiences, some of the most popular are ones that push you to your limits… so, from dizzying heights to death defying dangers, and the downright creepy… it’s time to travel the world to visit the top 15 most scary tourist attractions.