The Scorpion Submarine next to the Queen Mary in Long Beach is a self-guided tour through a Soviet, Cold War era vessel.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/36521958135@N01">JD Lasica</a> from Pleasanton, CA, US
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/jdlasica/21620436691/">Queen-Mary-Scorpion-submarine</a>