Sea stack is a natural occurrence ... In the final stage, waves and winds break down the rocky arch, forming a sea stack. The destructive forces that shape the sea stack are the same ones that ...

There’s a great walk around here. Here we are! CONNOR: Another sea stack - with an arch in it too. ISLA: Yep, the cracks in the rock are how erosional features like The Old Man of Hoy start.

Percé Rock is one of the largest natural arches in the world. It rises sheer from the Gulf of St. Lawrence in Quebec near the village of Percé. It is a massive limestone stack 433 metres ...