One couple from South Carolina visiting the attraction quickly turned around once they saw the signs indicating the park would soon be closing.
Western Pennsylvania Park Deputy Superintendent Keith Newlin says it's only a matter of time before the area feels the economic impact.
"This place has about 20 to 30 workers," Newlin said. "And people come from all around to see this in October."
The Shanksville Flight 93 Memorial and Johnstown National Flood Museum are also closing during the shutdown, as are most national parks across the country.
It's the first time in 17 years the federal government has been forced to shut down.
The Democratic controlled Senate and Republican controlled House of Representatives failed to reach a deal on a budget before the October 1st deadline.
Many Republicans in the House of Representatives supported a plan to fund the federal government while delaying the implementation of the Affordable Care Act passed in 2010, but that plan didn't fly in the Senate.
According to the Congressional Research Service, there have been 17 government shutdowns since 1977.
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