It’s a really big beautiful botanical park in Tokyo with a nice green house. I went there a few months ago after the big typhoon hit there, many trees were knocked down by the killing wind, even big ones. Recently some newscaster’s body was found there, but hey, it’s still an amazing park.
Izu-Oshima is a small island which takes about two and a half hours by speedboat from the center of Tokyo. It is 120km away, but still is "Tokyo". The island welcomes you with a distinctive landscape, having Mt.Mihara, a sacred volacano at the center. Travelers will fully realize how small they are facing the majestic landscape of Izu-Oshima.