With Halloween approaching, Yelp has created a new list centering on the creepiest areas in the U.S. To determine rankings, the website combed through reviews of cities that contained words such as "ghost" and "haunt.". 1. Savannah, Georgia. 2. New Orleans, Louisiana. 3. Fort Collins, Colorado. 4. Santa Cruz, California. 5. Las Vegas, Nevada. 6. Austin, Texas. 7. San Francisco, California. 8. Memphis, Tennessee. 9. Orlando, Florida. 10. Los Angeles, California.