Rocky Mountain National Park isn't the only unit of the National Park System that's been closed by floodwaters. Down in New Mexico, Gila Cliff Dwellings National Monument remained closed Monday as a result of heavy precipitation the past few days.

Roads severed. Walls of rock and mud blocking access. Trails washed out. That is some of the aftermath at Rocky Mountain National Park, where streams and rivers normally feeble at this time of year swelled to spring runoff levels and more after days of torrential rains.

Fee increases, some up to 100 percent, are being proposed at Wind Cave National Park in South Dakota.

In 1928 a highway known as the Tamiami Trail was built across the southern Florida peninsula, and while it was a boon for developers, the dam-like road fill created serious problems for Everglades National Park. A partial solution—replacing some of the road's berm with bridges—got a welcome boost with a recent pledge of $90 million from the State of Florida.