I did it last time I was out there..., I had fun and some time to kill before my flight. The tour guide makes the tour interesting. The actual sights are cool

I did it last time I was out there..., I had fun and some time to kill before my flight. The tour guide makes the tour interesting. The actual sights are cool but you're effectively on a guided tour through maybe a few small blocks of buried sidewalk. It is not earth shattering stuff though the history is definitely cool. In the end it was worth the ~$40, $20 for the tour I think, and I felt generous so I gave the guide a big tip since he was hilarious and took us on a slightly extended route according to some folks who had done the tour in the past.