There are many landmarks that Americans have been to, but many tend to ignore the popular landmarks in their own backyard that foreign tourists put on their must-see list. Hotwire.com announced the results of its American Travel Behavior Survey which revealed which well-known landmarks that a majority of Americans have never visited.

According to the survey, which included responses from more than 2,000 U.S. adults, there are many landmarks that Americans haven't seen. In Washington, 78 percent of adults have never visited The Space Needle. Seventy-three percent of adults said they have never visited Yellowstone National Park. In St. Louis, Missouri, 70 percent of adults have never seen the Gateway Arch. Sixty-nine percent of adults have never visited the iconic Hollywood sign in Los Angeles, California and 45 percent of adults have never been to the Las Vegas Strip.

"The overall number of Americans who haven't visited their country's most famous sights is simply staggering, but what's even more surprising is that more people have visited Las Vegas than the White House, which last year's study found to be overlooked by 57 percent of Americans," said Clem Bason , president of the Hotwire Group in a press release. "We want to encourage people to take more trips because pictures and videos aren't enough to capture the scale and majesty of these iconic landmarks. And with the discounted air, hotel and car prices on Hotwire, a getaway to these famous sites can be planned on a very reasonable budget."

In addition to indicating what landmarks are the least visited, Hotwire has some deals that would motivate people to go out and see these places, especially as the weather warms up for summer. Check out Hotwire.com for some of the best hotel rates, average car rental rates and low-cost airfares.