Loreley

 hill, rocks, invisible

The Loreley (also written as Lorelei) is a rock on the eastern bank of the Rhine near St. Goarshausen, which soars some 120 meters above the water line. It marks the narrowest part of the river between Switzerland and the North Sea. A very strong current and rocks below the waterline have caused many boat accidents there.

Loreley is also the name of one of the beautiful Rhine Maidens who lured navigators of this river to their dooms with their alluring singing, much as the ancient Greek Sirens did.

The name comes from the old German words "lureln" (Rhine dialect for "murmuring") and "ley" (rock). The translation of the name would therefore be: "murmur rock" or "murmuring rock". The heavy currents, and a small waterfall in the area (still visible in the early 19th century) created a murmuring sound, and this combined with the special echo the rock produces which acted as a sort of amplifier, then gave name to the rock itself.[1] The murmuring is hard to hear today due to the urbanization of the area. Other theories include attributing the name to the many accidents, by combining the word "luren" (lurk) with the same "ley" ending, with the translation "lurking rock".