I actually visited in June 2018, however due to travelling all over the world for the last 18 months, I am just in the process of writing all the reviews. What a brilliant tour! I did the Underground Tour which focuses on the flooding problem in the city back in the 1850-60s. Our tour guide, Rose, was dressed in period clothing and she was very entertaining throughout the hour tour! The tour starts above ground and offers two separate opportunities to go underground to the original city level. The tour also includes some personal stories about people who lived in that time period as well as local businesses in operation. There’s also an underground space which was cemented over the top of the original first floor which has preserved a lot of the belongings left behind from that time period which is pretty cool! It was a really interesting tour! I 100% recommend doing this!