United States of America

Here is the original photo on Flickr: external link
It's Lake Sammamish, Washington! Put the location up please! :)

Western Washington or Oregon, probably

This is Lake Sammamsish near Seattle, Washington, USA. Here's the original Flickr link: external link

Aareweg in Interlaken, Switzerland (a bridge is on the right) -- on the other side of the river looking over

B.C, Canada

Looks like the mercer island area of washington state on lake washington mebee