Geography

An estuary is a type of ecosystem found when a river flows into the ocean. Discover 10 of the world’s largest estuaries.

These Are the Wettest Places on Earth

Most travelers hope for clear blue skies and abundant sunshine on their vacations, but there are some places where rainfall reigns supreme. From the islands of Hawaii to the hills of northeastern India, discover nine of the wettest places in the world

Geography
10 of the Deepest Canyons in the U.S.

Canyons are a breathtaking showcase of millions of years of geological activity. From the iconic Grand Canyon to the waterfalls of Columbia River Gorge, take a journey down into the deepest canyons in the United States

Geography
The Hottest Places on Earth

From the bone-chilling subzero climates of the Arctic Circle and Antarctica to the scorching deserts of Africa and the Arabian Peninsula, Earth is home to vast temperature extremes. These are seven places where the daily highs regularly exceed 100 degrees Fahrenheit.

Geography
The 10 Most Populous U.S. Counties

Today, there are more than 3,100 counties in the U.S. that manage local law enforcement, public health, judicial courts, and other important affairs. These are the 10 U.S. counties with the biggest populations.

Geography