What the heck is underneath our city? Thanks to urban archaeologists and construction workers, we have *some* ideas. Dr. Linda Rudy was prompted to ask us about this when she spied some old railroad ties being hauled up underneath her street. WBEZ's Susie An finds out what can be known and what's been lost to time.

For more on this story, check out: http://www.wbez.org/series/curious-city/construction-work-boon-urban-archaeologists-104958

Also: if you want to contribute your memory of Riverview Amusement Park, call 1-888-789-7752. The line will be taking calls for the next week or so. Thanks!

Music in this episode by: Rainbro and DJ JBVicious