Some argue that the Haunted Mansion at Disneyland is hands down the best ride in the park. While it definitely is a top contender, there's another Haunted Mansion in one of the sister locations that out-creeps the attraction in the Anaheim park by far.
The one at Disneyland Paris is actually called Phantom Manor, the only version that has a completely different name and appearance compared to the original and its global copycats. There is the exception of Hong Kong Disneyland's Mystic Manor, but it has a totally separate theme (exotic museum) from the rest, so it doesn't count.
Phantom Manor is definitely darker and spookier on every level, making it another great reason to visit Disneyland Paris. See four reasons ahead.