Image source : https://www.cntraveler.com/galleries/2016-07-09/11-coolest-underwater-hotels-in-the-world/2 Kimmo Huosionmaa Today we can go to trip and take a room in the underwater hotel. There is no special technology needed when people build underwater experiment stations. Only normal tank what is used for oil storage is enough. That tank can drop to lake or sea by ship, and there might install snorkel system what makes possible to live in that undersea element for long period. If water is not very deep, even lightweight capsules will be enough to keep water out of the station. The snorkel must make with two pipes which another brings fresh air to tank and other will use for removing that polluted air and exhaust gases what comes from pumps if they are used by combustion engines. Exactly the power supply in that system will be aggregate, what supplies electric power to that underwater house. This particular system might use an invention called “closed ...