"Breath taking" is a common variant of "breathtaking," meaning stunning or awe-inspiring. It describes sights or feats so beautiful, thrilling, or shocking that they seem to steal your breath.
It is a magnificent country, lonely, grand in scale, stretching for mile upon mile, the clear blue air stabbed with peaks of snow, where the sun glints on the ice surfaces, green as sea ice, breath taking in its scope. Judy LaMarsh