To leave the town in which I grew up you could drive through a tunnel that crossed beneath an estuary, and then came out in the adjacent town. During one of my earliest memories of going through that tunnel, my dad was driving, and as we reached the halfway mark through the tunnel he said, "We're driving under water right now." I thought it was amazing that we didn't have to hold our breath! Also, I remember that there were maintenance doors in the sides of the tunnel, and I imagined that if you opened one of those doors you would see an underwater scene with fish swimming by. Somehow in my imagination, the water didn't just come rushing in through the door and flooding the tunnel.
A childhood belief about excursions

others believed things like this
- If you hold your breath and make a wish under a highway tunnel it will come true....I still hold my breath :)— aj
- That there was an underground tunnel linking New York to San Francisco.— Christophe Chang
- I used to believe that the Lehigh tunnel in Pennsylvania was created by Superman.— Holz
- I used to think underground trains actually descended into the tunnel, like a rollercoaster.— Natasha
- i used to believe that pools had underwater doors that sharks were going to swim out of.— marky
- I didn't think you could put out a fire with hot water - only cold water would do.— Katti Pytt