Reiyukai Shakaden Temple (霊友会釈迦殿)

This giant complex with a pyramid-shaped roof in the heart of Tokyo may look like it’s straight out of a sci-fi movie, but it is actually the headquarters of a Buddhist sect that aims to promote world peace. Despite its forbidding exterior, the temple welcomes visitors warmly and even offers free Japanese lessons. It houses a giant Buddha carved from ancient camphor wood, as well as a reservoir that can be used by the city in case of emergencies.