Philadelphia, Pennsylvania’s largest city (estimated population of 1,6 million) is notable for its rich history, on display at the Liberty Bell, Independence Hall (where the Declaration of Independence and Constitution were signed) and other American Revolutionary sites. With a past that dates back to the early 1600s, Pennsylvania teems with historic sites known for paranormal activity and unexplained happenings. Check out these spooky locales, where you’ll discover fascinating history – and possibly a ghostly encounter. The oldest sections of Philadelphia—Southwark, Society Hill, and the Independence Hall area—lie to the east, along and inland from the Delaware. Southwark is the oldest, having been settled by Swedes in 1643. Those of its ancient and dilapidated houses that have escaped bulldozing for riverfront expressways resemble the edifices of Society Hill before its restoration began in the 1950s. This latter area contains some of the city’s finest old houses, taverns, and churches, though some high-rise apartment buildings. Time.com listed the city of Philadelphia as one of the world's 100 greatest places in 2021.