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Most popular US National Park Service site: Golden Gate National Recreation Area in California's Bay Area came in first place with 15 million visits in 2019.
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2. Blue Ridge Parkway. The parkway that wanders through North Carolina and Virginia for 469 miles, with many beautiful stops along the way, attracted 14.9 million visits last year.
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3. Great Smoky Mountains National Park: The park straddles the border between North Carolina and Tennessee.
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4. Gateway National Recreation Area has 27,000 acres in Sandy Hook, New Jersey, and Jamaica Bay and Staten Island in New York.
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5. Lincoln Memorial: This monument to the 16th US President reads: "In this temple, as in the hearts of the people for whom he saved the Union, the memory of Abraham Lincoln is enshrined forever."
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6. George Washington Memorial Parkway: The parkway is home to the Navy-Merchant Marine Memorial, which sits on the banks of the Potomac next on Columbia Island.
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7. Lake Mead National Recreation Area: America's first and largest national recreation area, Lake Mead has 1.5 million acres of mountains, canyons, valleys, two lakes and nine wilderness areas.
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8. Natchez Trace Parkway: A 444-mile scenic drive through three states - Alabama, Mississippi and Tennessee -- it's home to 10,000 years of history.
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9. Grand Canyon National Park: This Arizona park is home to a canyon that is 277 river miles long, up to 18 miles wide in parts and a mile deep.
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10. Gulf Islands National Seashore: A two-state protected seashore in the Gulf of Mexico, Gulf Islands hosts visitors who want to swim, fish, camp, bird-watch and more.
CNN  — 

Ellis Island was once the United States’ busiest immigration hub, with teams of doctors working to prevent the spread of infectious diseases including measles, scarlet fever and diphtheria.

On March 16, the National Park Service temporarily closed the site to protect visitors and staff from the spread of coronavirus. Along with the nearby Statue of Liberty, it’s one of a handful of national park closures related to the virus.

The shuttered parks, which include historic sites and natural spaces, go from California’s Golden Gate National Recreation Area (the nation’s most popular NPS site) to the Washington Monument in D.C.

National park closures (so far)

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Golden Gate National Recreation Area is closed for now because of the coronavirus outbreak.

Ellis Island and the Statue of Liberty were both closed effective Monday, March 16.

In Washington, the Washington Monument closed on March 14, along with Ford’s Theatre National Historic Site, the Old Post Office Tower and Belmont-Paul Women’s Equality National Monument.

California’s Golden Gate National Recreation Area also announced a temporary closure effective March 16. In San Francisco County, that includes Alcatraz Island, the Presidio Visitor Center, Fort Point NHS, Golden Gate Bridge Welcome Center and Lands End Lookout.

Closures in nearby Marin County include the Marin Headlands Visitor Center, the Nike Missile Site, Point Bonita Lighthouse, Muir Woods National Monument and all park campgrounds. In the Golden Gate National Recreation Area, visitors may still use trails and open areas.

Additional closures are listed on this page of active alerts, along with facility closures in some parks that remain open.

These are likely to change in the coming days. In a March 17 statement, the National Park Service announced it planned to modify operations to comply with CDC guidelines, with the possibility of closing facilities that are unable to comply.

“The health and safety of our visitors, employees, volunteers, and partners is the priority of the National Park Service,” said Secretary of the Interior David Bernhardt in the statement. The Department of the Interior oversees the park service.

“Park superintendents are empowered to modify their operations, including closing facilities and cancelling programs, to address the spread of the coronavirus.”

Upcoming status updates will be posted by individual parks.

Effect on national park staff and the public

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Visitors can still drive along the Blue Ridge Parkway and see beautiful views.

Despite these closures, the vast majority of national parks remain fully or partially open.

But in an open letter released on March 16, an organization representing Park Service retirees called on the agency to introduce broader closures to protect the staff and the public.

Chair Phil Francis of The Coalition to Protect America’s Parks argues that “to suggest to the public that gathering at national park sites is acceptable … is irresponsible to the visiting public and employees.”

“National parks welcome visitors from around the world,” Francis writes. “Many National Park Service (NPS) employees interact with members of the public daily.”

The Coalition to Protect America’s Parks recommends that nonessential employees should practice social distancing and stay home when possible, asking the agency to close all facilities that require staff and members of the public to be in close proximity.

“These are unprecedented times that call for unprecedented measures,” writes Francis. “We must take care of our federal employees and their families.”

The benefits of getting outside

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Great Smoky Mountains is the nation's most popular national park.

The national park closures come at a time when many in the United States are looking for ways to enjoy themselves while maintaining the social distancing recommended by the Centers for Disease Control and Prevention, which includes staying six feet away from others.

But following the CDC guidelines – and protecting NPS employees – doesn’t mean being stuck indoors. Whether you’re visiting a local park or a community garden, getting outside can be done safely, and studies show it can be beneficial for your health.

In a 2018 study, lead author Caoimhe Twohig-Bennett found that spending time in green spaces can reduce the risk of high blood pressure, type II diabetes, cardiovascular disease and premature death.

Even a walk in the park can pay off quickly, notes Twohig-Bennett, a research and policy manager at Epilepsy Research UK whose PhD is in public health.

“Greenspace interventions such as ‘forest bathing’ have shown almost immediate benefits in terms of reduced blood pressure, heart rate and reduced salivary cortisol,” she writes.

That means people wishing to seek out the benefits of time outdoors don’t need to wait for the weekend. And they don’t need to set their sights on a faraway national park.

“We included studies that investigated the impact of urban greenspaces such as urban parks and even street trees and greenery,” writes Twohig-Bennett. “Both were found to be beneficial for health.”

Jen Rose Smith is a travel writer based in Vermont. Read more of her work at www.jenrosesmith.com.