I have visited Disneyland Paris two times- My Suggestions Below
NOTE: See my blog post on Phantom MANOR- (GREAT Attraction and story)
I've done both parks in one day with a park-hopper ticket I bought on the DLP website.
I would personally say that unless you can find a good deal on a two park ticket, just do Disneyland Park. Walt Disney Studios Park was disappointing, and we only did two attractions before switching to Disneyland Park for the rest of the day.
Many of the attractions there are cloned from other Disney parks, and the only non-clone I'd recommend is Crush's Coaster. Given the typical crowds at Disneyland Paris, you really need a full day at Disneyland Park to do everything plus another 2/3 to a full day for Walt Disney Studios Park.
If you do want to visit both parks in one day, I would recommend arriving at least 45 minutes before the Studios park opens (an hour would be ideal). This is because instead of a rope drop, guests are free to join the queue for any attraction immediately after they enter the park(although they don't start loading until official opening time).
Go straight to Crush's Coaster, and with luck you will be off within about 45 minutes of opening.
Get a Fastpass for either Rock 'n' Roller Coaster or The Twilight Zone Tower of Terror, then ride the other. Once you've used your Fasspass, get over to Disneyland Park.
Nothing else at the Studios park is worth it if you only have one day (unless you're a show person, in which case there are a few good ones...pick only one or it will be too much of a time drain).
At Disneyland Paris, make sure you take full advantage of the Fastpass system, as the lines can be insane (on my visit, almost every ride had 60-90 minute waits for a majority of the day). I would consider the following six the park's must-see attractions:
Alice's Curious Labyrinth
Big Thunder Mountain
Le Chateau de la Belle au Bois Dormant
Pirates of the Caribbean
Space Mountain: Mission 2
Other than that, the park's got a lot of similar attractions to the US parks (although mainly in French), and a number of walkthroughs that are good for killing time while waiting for a Fastpass.
Other than Space Mountain and Big Thunder Mountain, the park also offers Fastpass on Indiana Jones et le Temple du Peril, Buzz Lightyear Laser Blast, Star Tours, and Peter Pan's Flight. Also note that single rider lines are practically non-existant at Disneyland Paris (there may be one or two at the Studios park, but I know for sure there are none in Disneyland Park).
Disneyland Paris In One Day
Here are a few quick notes regarding Disneyland Park attractions that may not be so obvious to a casual guest:
Phantom Manor is the Disneyland Paris take on the Haunted Mansion; it’s much darker than Haunted Mansion, but awesome for its own reasons (make sure to explore the Boot Hill Cemetery outside the exit)
Space Mountain is much more intense in Paris and includes inversions
Indiana Jones and the Temple of Peril is nothing like the Disneyland Indiana Jones attraction; the Paris Indiana Jones attraction is a bare-bones coaster that is very forgettable
Disneyland Paris has the best version of Pirates of the Caribbean, but it can draw long lines
Storybook Land Canal Boats (Le Pays des Contes de Fees) is a modernized version of the Disneyland classic, but with more to see
Alice’s Curious Labyrinth is worth doing for the view alone from the top of the castle
The Sleeping Beauty Castle walk-through is not-to-be-missed…we visited the dragon several times during our trip!
Big Thunder Mountain is similar to the other BTMRR attractions, except on its own island; despite the similarities, it’s definitely worth doing
Make sure to tour the Nautilus; it’s a simple walk-through, but 20,000 Leagues fans will really appreciate it
Don’t miss Le Passage Enchanté d’Aladdin, Adventure Isle, or the Swiss Family Treehouse – these are all walkthroughs, but all are excellent
Take some time to explore both Main Street Arcades
Disney Dreams is absolutely not to be missed; stake out a spot at least 30 minutes in advance–more during busy seasons; check out this post for Disney Dreams viewing spots and photography tips
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