In Vienna, Austria, tap water isn't just 'run of the mill' water you'd get in other places, it's pristine mountain spring water, transported all the way to the city through old, yet sturdy, aqueducts.

What's amazing about this is that it's not just safe to drink, but often it surpasses the quality of bottled water you'd find in many other countries. So, the next time you're in Vienna, don't hesitate to fill your cup or bottle straight from the tap.

It's not only environmentally friendly, but you'll be enjoying some of the best water around. Truly a testament to how traditional infrastructure can serve modern needs while preserving the environment.