When the afternoon sun illuminates Horsetail Fall in Yosemite National Park, it can be difficult to believe it's only the sun igniting the waterfall.

A decline in razor clam numbers along the Kalaloch Beach in Olympic National Park has prompted park officials to close the clamming season there for the rest of the season.

As Japan reeled from the shock of a magnitude 8.9 earthquake that triggered horrifically destructive tsunamis there, 20 countries prepared to absorb tsunami impacts on their own coasts. Here in America, coastal national parks in Hawaii, Alaska, Washington, Oregon, and northern California are in the bullseye.

Some secondary roads and campgrounds in Great Smoky Mountains National Park are scheduled to open today, marking the start of the park's summer season as crews work to open roads and facilities that have been closed all winter.