Visit the John F. Kennedy Memorial Plaza
Dallas has a rich history, both good and bad, and is most famous as the site of the assassination of former President John F. Kennedy. The John F. Kennedy Memorial Plaza is free to visit, but admission to The Sixth Floor Museum, which is dedicated to JFK's life and legacy, will cost you. It is a cenotaph, a type of open tomb monument popularized by architect Philip Johnson, and visitors are welcome to step inside and reflect.
Just down the road is Dealey Plaza, the site of the assassination of President John F. Kennedy and now a National Historic Landmark District.