Most of the places mentioned can be visited, and I have seen a few of them myself, including Antelope Canyon in Arizona and Giant's Causeway in Northern Ireland, two of the most amazing natural wonders I have ever seen, and such man-made oddities as the Bata Shoe Museum in Toronto, the Weeki Wachee mermaid show in Florida and Lily Dale, a small town in New York that has long been a hangout for spiritualists.
People everywhere seem to have a fascination with the human body, and the book shows many unusual cemeteries, as well as museums dedicated to torture, mummies, human body parts, undertaking, murders and, tame by comparison, medicine. Quite a number of other attractions are the work of artists, gardeners or people with delusions of grander.
There's an artist in Mexico who built a five-story house for himself in the shape of a nude woman. His bedroom was in one of her breasts. Believe it or not.