I need to link two buildings together over some kind of WAN link. The buildings are about 3 miles apart from each other. There's no line-of-sight, but there aren't really any hills or anything between the buildings, just trees and stuff. One of the buildings is on top of a hill, the other across a river in the valley.

I've heard of wireless bridges that can span 5 - 10 miles and I was wondering if anyone knows of such a beast. Speed isn't a huge option, the link is mostly just to get internet to the remote location. The most I really need is 1.5 Mbps, anything over that is gravy.

Cost isn't much of an issue since leasing a land-line will end up costing us tons of money in the long run.

Any help would be appreciated.

TIA