Rainbow Falls: flowstone and a pool built drip by drip

Rainbow Falls sits at the far end of the Concert Hall, where flowstone spreads down the wall like a frozen waterfall. At its base is a rimstone pool.

The pool is still growing. Water dripping from the ceiling lands on the pool and sends out a ripple. Each ripple leaves behind a tiny amount of calcite, and over time that calcite forms the pool's own mineral dam.

What to know

• Rainbow Falls and a rimstone pool are at the far end of the Concert Hall.
• The pool forms where water dripping from the ceiling sends out ripples that deposit calcite and build a dam.

Book a Tour

Not yet placed on the survey map.