Three large ritual baths, built around 10 CE, are evidence of the massive influx of Jewish pilgrims visiting the Second Temple some 2,000 years ago. The public infrastructure is located just 50 meters from the entrance to Judaism’s most central house of worship.

https://www.timesofisrael.com/ancient-public-mikveh-complex-used-for-festival-pilgrimage-uncovered-at-foot-of-temple-mount/