See the two seas meet at Grenen

Seven kilometres of pure white silica sand in the Whitsundays, swirling into the turquoise Hill Inlet.

An 8-km beach with no hotels at all, reached by boat through Jaragua National Park — the wildest sand in the Caribbean.

Powder-white South Pacific beach.

The highest tides on Earth, best watched among the Hopewell Rocks flowerpot stacks.

Coastline of spouting blowholes.

Waves forced through lava tubes blast spray 30 metres into the air — locals throw coconuts in to launch them.

Plankton light the surf electric blue on Vaadhoo and other islands on dark nights.

White dunes meeting the Atlantic.