national parks

From Acadia in Maine to Zion in Utah to the North Cascades in Washington, America's 401 national park areas have gates blocking entrance roads.

The last remaining campers and hotel guests in the parks must leave Thursday, and park rangers will patrol to keep others out.

The national parks "belong to the American people, and the American people should have the right to come in," says National Park Service Director Jonathan Jarvis. "But the only way I can protect these places during this period is to shut them down."

Closed national parks will be one of the first visible effects of the partial government shutdown expected to begin Tuesday. National forest and BLM campgrounds will also close.