Yes, under Jefferson Park. On the hill by Marshall and 20/21st st. It's a long tunnel but the train is very near the Western entrance. Check out this book on amazon, even for someone who doesn't like to read I found it fascinating.
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https://www.amazon.com/Collapse-Richmonds-Church-Tunnel-Disaster-ebook/dp/B00XQUNKCQ/ref=sr_1_1?keywords=church+hill+tunnel&qid=1561246444&s=digital-text&sr=1-1