Zeniarai Benten Shrine in Kamakura is unique as people come here to wash their money. Zeniarai means coin washing. It is said that money washed in the shrines spring, will double in value.
The founder of the Kamakura government, Minamoto Yoritomo, ordered the construction of the shrine after a god appeared in a dream and recommended him to build the shrine in order to bring peace to the country. As the dream occurred on the day of the snake in the month of the snake in the year of the snake, the shrine was later also dedicated to Benten, a buddhist goddess associated with snakes.
The Zeniarai Benten Shrine in a surviving example of the fusion between buddhism and shinto. Many of the other shrines were stripped of buddhist connections when the Meiji government attempted to emancipate and separate shinto from buddhism.
The entrance is through a tunnel, as seen below. The fun bit of this shrine is definitely trying to wash your money. And the various money laundry jokes you can make about it.
A Lilly among the cherry blossoms 