Turquoise Siberian lake loved by Instagrammers turns out to be toxic waste dump
bbc.com
bbc.com
But "do something stupid/dangerous to show how brave you are" is part of human nature.
Buy/rent a small lake, turn it blue/pink/multi color, sell tickets to Instagrammers.
https://petapixel.com/2019/05/22/the-chinese-instagram-villa...
Looks like there are some romantic AirBnB get-aways available near Love Canal:
https://www.airbnb.com/s/Niagara--New-York--United-States/ho...
https://en.wikipedia.org/wiki/Love_Canal
Also quite a few in Chernobyl with glowing reviews:
https://www.airbnb.com/s/Chernobyl--Kyivs'ka-oblast--Ukraine...
Don't go into the reactor sarcophagus, don't eat the soil at Love Canal, and you'll be fine for a romantic weekend.
Also, it's a very interesting place to visit. Can recommend; been there in 2017.