A stark contrast between red sand dunes and the white sand beach immediately next to it can be seen along the southern Somali coast.

A controversial interactive sculpture that "weeps" water.

Dive into an undersea optical illusion off the coast of Mauritius.

This sea-based blowhole releases seawater when waves hit the coastal caves.

This public artwork, hidden down a cliffside hiking trail, encourages visitors to contemplate the tides.

People have been making salt here using traditional methods for centuries.