Final answer:
The Edgar Allan Poe National Historic Site is located in Philadelphia, Pennsylvania. The correct choice is not listed in the given options.
Step-by-step explanation:
The Edgar Allan Poe National Historic Site is located in Philadelphia, Pennsylvania. To address the multiple-choice options provided, the correct answer is not listed, as the site is neither in Bucks County, Nassau County, near Newark, New Jersey, nor near Pittsburgh, Pennsylvania. The site is dedicated to the famous American writer Edgar Allan Poe and commemorates his residence in Philadelphia, which is significant in understanding Poe's life and work, including stories like The Purloined Letter and The Fall of the House of Usher.