Last year in early June it was too early, we thought, for fireflies in Colorado. For weeks we had been checking weather forecasts, comparing them to previous years, waiting for warmer nights and ...

Many wetlands are disappearing, but Louisiana’s “accidental” Wax Lake Delta is growing—and informing coastal restoration ...

Under a swath of Kentucky hills and hollows is a limestone labyrinth that became the heartland of a national park. The surface of Mammoth Cave National Park encompasses about 80 square miles.

To prevent further destruction of its unique bounty, the area was designated a national monument in 1906 and a national park more than a half century later. If you are traveling west on I-40 ...

The Colorado June air was thick with summer heat. Mosquitoes rose in clouds around us, testing our resolve while we gathered our cameras and sensors ...

Go with Nat Geo: Explore China's Imperial Treasures and Natural Wonders on a tour with National Geographic Expeditions. Archers in the terra-cotta army of China's first emperor rise from the ...

Robert F. Kennedy, Jr., calls the Great Bear Rainforest "the planet's last large expanse of coastal temperate rain forest." Stretching for more than 250 miles along the coast of British Columbia ...