The Chicago Museum of Science and Industry 18-Foot Walk-Through Heart Display.
The Museum of Science and Industry announced on May 31, 1952 that visitors would soon be able to walk through an 18-foot heart, part of a 3,000 square foot exhibit sponsored by the Chicago Heart Association. As part of the experience a human pulse will be audible inside the heart. In another part of the exhibit the circulation of blood will be illustrated.
Installed in 1954, the heart is so big that it would fit into the chest of a 28-story human.
By 2009, the museum had replaced it with a new high tech heart with digital projections, but no walk-through.