Natural Wonders of the World Quiz

The Colorado River has cut through layers of rock over millions of years.

The Iguaçu River forms the Argentina–Brazil border at the falls.

Tiny coral polyps build calcium-carbonate reef structures over time.

A thin layer of wet-season water creates the famous reflection.

The Zambezi plunges along the Zambia–Zimbabwe border.

Erosion sculpted the bay’s limestone karst pillars.

Auroral activity forms an oval around Earth’s magnetic poles.

A mantle hotspot created the volcanic Galápagos archipelago.

Sossusvlei lies within Namibia’s ancient Namib Desert.

Glaciers carved Milford Sound, making it a fjord despite its name.

Glaciers sculpted Yosemite’s massive granite landscape.

The Niagara River flows from Lake Erie into Lake Ontario.

Most of the Amazon rainforest lies within Brazil.

Uluru is a massive sandstone formation in central Australia.

Ngorongoro is a vast volcanic caldera in northern Tanzania.