Catacombs of Paris

The Catacombs of Paris is a unique and eerie tour where visitors can explore the underground ossuaries holding the remains of over six million people. These catacombs were created as a solution to the city's overflowing cemeteries in the late 18th century. The underground tunnels provide a haunting yet fascinating glimpse into Paris's history and are a must-visit for history enthusiasts and adventurous tourists.

The video advises looking for the exit sign that says Catacombs or Sacré-Coeur when navigating the Paris Metro. The Catacombs are suggested as an example of a major attraction accessible by the metro system and recommended for visitors interested in historic and unique experiences.