Enjoy a luxurious lunch, spend the night gazing at deep sea creatures, take in museum exhibits or even catch a glimpse at an underwater stripper pole in these seven wonders of submerged architecture. Located from 20 to 50 feet below the surface, these real-life submarine structures (including a couple concepts currently under construction) would make for a swinging town for mermaids and mermen if they were all located in the same place.
