Something wonderful via Eric Baus:

The Conet Project

For more than 30 years the Shortwave radio spectrum has been used by the worlds intelligence agencies to transmit secret messages. These messages are transmitted by hundreds of Numbers Stations.

These stations use very rigid schedules, and transmit in many different languages, employing male and female voices repeating strings of numbers or phonetic letters day and night, all year round.

One might think that these espionage activities should have wound down considerably since the official end of the cold war, but nothing could be further from the truth. Numbers Stations (and by inference, spies) are as busy as ever, with many new and bizarre stations appearing since the fall of the Berlin wall.

[The Conet Project] contain 150 recordings spanning the last twenty years; taken from the private archives of dedicated shortwave radio listeners from around the world.

While I don't find these recordings to be quite my ideal soundscape (as Eric does), I do find myself completely mesmerized by the often eerie quality they possess. Highly addictive listening that is strangely beautiful.