I would love to visit this place to take photographs.
Located in the large mountainous Izu peninsula, along the coast just a little to the west of Tokyo, this was a popular theme park that opened in 1969, but the concept aged badly in Japan’s growing consumer culture which constantly demanded the latest and greatest in entertainment and attractions. The park closed in 2003 when visitor numbers fell to a record low and all 12,000 square meters of the place has been deserted ever since.
At 12,000 square meters, I think that might just make it the largest abandoned botanical garden in the world. Made up of numerous greenhouses, vast and overgrown, one measures as large as 50 by 70 meters.
Now, here are some photographs.