Show off your country, state, province, county, city, town, or what have you; and don't forget the who, what, where bit. A Wikipedia link would be cool too.
First up is Crater Lake National Park
from my neck of the woods; the great Pacific Northwest of the US. Located in the state of Oregon, Crater Lake is breathtaking. You can't imagine how blue the water is until you see it for yourself. A must see if you're visiting the west coast.