(Photo: Maria Ramey)
This massive instrument is, believe it or not, a flute. Specifically, it's a subcontrabass flute. It plays notes 3 full octaves below that of a concert flute. It typically measures 17.7 feet long. That's a lot! So it's not surprising that it's necessarily bent into a triangle shape, bringing it down to 7.7 feet when stood up straight. It weighs 33 pounds, so it's not ideal for a marching band.
This is 1 of 8 unusually large musical instruments rounded up at Mental Floss by our own Miss Cellania, including a pipe organ that has 7 keyboards and more than 1200 stop keys.
-via The Presurfer