Simplify the following text for a Grade 12 native English-speaking person.
Original: This expansion pack featured levels that were based on real-world locations , such as the White House , the FBI headquarters , the Smithsonian museum , and the Washington Monument and other places in Washington , D.C. .
Simplified: This pack has levels that are based on real locations of Washington DC , such as the White House , the FBI headquarters , the Smithsonian museum , and the Washington Monument and others .