Our house in Japan really was built over a koy pond like this! We had a huge, 8 inch thick piece a glass for viewing, right in the middle of the living room floor. This one is from Kenrokuen, Kanazawa, Japan. Love it!
The red gate you see in the picture is the gate (torii) for one of the shrines in Kyoto, Japan. The color red is a charm against evil spirits for many shrines across Japan. Colors can have different meanings and messages around the world.