Hillier Lake, Western Australia: The pink and lovely Hiller Lake is the only vividly pink lake you will find in the world. The color is permanent and never changes, even when water is removed and placed in a separate container. Its startling color remains a mystery and while scientists have proven it's not due to the presence of algae, unlike the other salt lakes down under, they still can't explain why it's pink.... definitely going
Underwater subway ... In Venice, Italy = authorities decided to build undersea subway to combat the traffic problems during heavy tourist season. This railway is from the west coast of mainland through the urban Bridge, then from Piazzale Roma to drill into the sea, and then around the islands of the entire urban Bridge. The Rail is 12 kilometers long. The vehicles do not have iron wheels, but more like a car with rubber tires, in order to travel more smoothly.
Sweet! Austria's Green Lake in the Hochschwab Mountains is a hiking trail in the winter. However, when the snow quickly melts in early summer it creates a completely clear lake. The lake has a grassy bottom, complete with underwater trails, park benches, and bridges to explore!