Uploaded September 2016 | Updated September 2026, 3 weeks ago

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St. Louis Zooline Railroad. The Emerson Zooline Railroad offers a 20-minute narrated tour weaving through tunnels and past favorite animal exhibits on a 1½-mile round trip. One of the Zoo's most popular attractions, the Zooline Railroad has transported more than 35 million visitors since 1963. The railroad operates year-round. It's like a huge model train you can ride! Ravel's Adagio in G as the background music.