AS a kid I have always thought it would be cool to dig a tunnel to China. I have stated a few times but my mom made me fill the holes. Having learned this is not yet practical and not really wanting more trade with China and also a lack of a country that I want a tunnel to, I have turned to large under water cities. This was true even before global warming. I also found voyage to the bottom of the more credible than lost in space. Then again penny was cuter that anyone on the Seaview.