[exray]

Along the East Coast, and where I'm at, its fun to DX for the European/North African broadcasters on LW. You can hear them, sometimes at "listening" quality during the season (Winter) and depending on propagation. I don't know how well you'd fare in mid-continent but I shared some real-time reception reports with a fella in Detroit and we were hearing basically the same things at the same time.

Apart from that there are the aircraft NDB beacons using modulated Morse Code. You can get some interesting DX via that mode as well in any part of the US. Easy to identify them