Frank Lloyd Wright's Falling Water

"Fallingwater is recognized as one of Wright's most acclaimed works, and in a 1991 poll of members of the American Institute of Architects, it was voted "the best all-time work of American architecture." It is a supreme example of Frank Lloyd Wright's concept of organic architecture, which promotes harmony between man and nature through design so well integrated with its site that buildings, furnishings, and surroundings become part of a unified, interrelated composition. Wright embraced modern technology to achieve this, designing spaces for living which expressed architecturally the expansive freedom of the American frontier."

http://www.paconserve.org/fw-building.asp

Liberty Bell

"The Liberty Bell, located in Philadelphia, Pennsylvania, is an American bell of great historic significance. The Liberty Bell is perhaps one of the most prominent symbols associated with the American Revolution and the American Revolutionary War. "

http://en.wikipedia.org/wiki/Liberty_Bell

Philadelphia Museum of Art

"The Philadelphia Museum of Art, located at the west end of the Benjamin Franklin Parkway in Philadelphia's Fairmount Park, was founded in 1876 in conjunction with the Centennial Exposition of the same year and is now among the largest and most important art museums in the United States. "

http://en.wikipedia.org/wiki/Philadelphia_Museum_of_Art

Independence Hall

"Independence Hall, officially known as the Pennsylvania State House, is a U.S. national landmark located in Philadelphia, Pennsylvania. Known primarily as the location where the Declaration of Independence was approved, the building is now part of the larger Independence National Historical Park and listed as a World Heritage Site. "

http://en.wikipedia.org/wiki/Independence_Hall

Love Park

"The now famous LOVE sculpture, designed by Robert Indiana, was first placed in the plaza in 1976 as part of the United States' Bicentennial celebration. It was removed in 1978, but the sculpture was missed and the chairman of Philadelphia Art Commission, F. Eugene Dixon, Jr., bought the sculpture and permanently placed it in the plaza. "

http://en.wikipedia.org/wiki/Love_Park

Tomb of the Unknown Soldier

"It honors the thousands of soldiers who died during the American Revolutionary War, many of whom were buried in mass graves in that park. "

http://en.wikipedia.org/wiki/Tomb_of_the_Unknown_Soldier_(Philadelphia) n

Betsy Ross House

"The Betsy Ross House is generally recognized as the place where Betsy Ross lived when she may have made the first American Flag. Several of her surviving family members, including daughters, grandchildren and a niece said that this was the location of the legendary event. "

http://en.wikipedia.org/wiki/Betsy_Ross_House