Tsuchiura Black Mansion: An Easy-to-Do Haikyo in Ibaraki Pref.
Ibaraki Prefecture appears to have its share of haikyo. Tsuchiura Black Mansion is one of the more easily accessible ones.
Read moreLocated 50m below ground, the G-cans is one of the largest underground drains in the world. Its main tank resembles a futuristic temple.
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