A massive gorge carved by the Colorado River, stretching 277 miles long and over a mile deep.
The world's largest coral reef system, home to over 1,500 species of fish and 400 types of coral.
A natural light display in the high-latitude regions of the Northern Hemisphere.
A river known for its colorful plants and algae that create a mesmerizing display.
A group of three waterfalls marking the border between Canada and the USA.
Natural hot springs and travertine terraces formed by calcium carbonate.
Limestone caves known for their unique glowworms.
The world's largest rainforest, home to a vast array of biodiversity.
The world's highest mountain, standing at 29,029 feet.
A bay known for its emerald waters and limestone islands.