14. The Initiation Wells in the Town of Sintra, Portugal

The Quinta de Regaleira estate is an ancient site that contains the ruins of a castle, chapel, and amazing stuccoes, but it’s the pair of wells that really brings in an influx of thousands of visitors annually. The wells, known together as the Initiation Wells, had a symbolic meaning of death and rebirth. The spiral design of the well depicts the nine circles of Hell and the nine circles of Paradise.