Not sure what happens at the Monkey Park when it is open but when it is closed all the monkeys come to gawk at and harass the humans in the parking lot.
Open: 8:30 – 16:30
Entry Fee: adults ¥500 / kids ¥250
The Izu Monkey park is on the west coast of the peninsula in Hakachizaki, Minami Izu.
UPDATE: I’ve heard the monkeys are going to retire and the monkey park will be closing this year.