Higurashi wellhouse

 is where the Bone-Eater's Well, which Kagome Higurashi uses to travel to Sengoku jidai, is located. Buyo wandered into this wellhouse, which was the catalyst for all of the events that followed; Kagome was looking for Buyo in the wellhouse, and was subsequently pulled into the Feudal Era through the Bone-Eater's Well by Mistress Centipede.