Sky of Birds
Like change? Then head down to the coastline, that narrow strip of land that borders the sea along a continent or an island. The nonstop change in tides, the freezing and thawing of ice, and constant wave action there means nothing ever stays the same. Breakers gnaw away at cliffs, shift sand to and fro, breach barriers, build walls, and sculpt bays.
Glaciers, rivers, and streams deliver a steady supply of building material for nature's unending job. And not to be outdone, the tectonic forces that move giant pieces of Earth's crust will periodically bump the bedrock here and squeeze fresh lava out there, adding their own flourish to the coastal redesign.
At the frozen poles or the sultry tropics, the coasts of the Americas host some of the greatest spectacles on earth. Against a brilliantly colored sunset, birds of Paracas flying along the coast in Peru.