It's Disneyland - named after the company, and Walt Disney World - named after the man. Walt never lived to see his "Florida Project" be completed. When Roy, his brother and lifetime business partner, dedicated the park on its opening, 5 years after Walt's death, he renamed it from Disneyworld to Walt Disney World, so that generations later would remember that Walt Disney was a person, not just a company name. (His analogy - everyone knows Ford cars. How many people remember Henry Ford?)

The names on the windows of Main St are not random - they are the "credits" of the park. They are the real men and women who helped to create Disneyland and Walt Disney World

The Magic Kingdom in Walt Disney World is actually three stories. The parts of the park that you and I see are the second and third stories. The first story is the "utilidors" - utility corridors. That is how cast members get around the park without being seen by guests. They were created because Walt saw in Disneyland a Frontierland Cowboy walking through Tomorrowland, destorying the theming.

In addition to the two-ply TP Michael mentioned, Club 33 is also the only place in Disneyland Park that serves alcohol.

There was an apartment in the plans for Walt Disney World's Cinderella Castle, intended to be an apartment for Walt and his family, much like the Firehouse apartment in Disneyland. Because Walt died before WDW opened, it was used for various functions over the years, including storage, cast member changing rooms, and telephone operators. Most recently, it was converted into the Cinderella Castle Dream Suite, and given away as a prize every night during the "Year of a Million Dreams" that lasted from October 2006 through December 2008.

Lands in Disneyland that aren't in the Magic Kingdom: Critter Country & New Orleans Square
Land in the Magic Kingdom that isn't in Disneyland: Liberty Square

You can ride in the front of the monorail at WDW, with the pilot. You just need to ask (and possibly wait, if another family has already asked). It's completely free, and never advertised.

WDW is 47 square miles. Of that, 1/3 has been developed, 1/3 is set aside for conservation efforts, and 1/3 is ready for future development.

Cheapest souveniers in the parks: buttons celebrating your birthday/anniversary/wedding/engagement/first-visit, etc. (free), your own learn-to-draw Disney character from the Animation Academy (Hollywood Studios in WDW, California Adventure in DL) (free); pressed pennies, found throughout the parks (51¢);

Fastpass at all 6 of the US Disney Parks is FREE with admission. It does not cost additional like some other parks that start with a U or a S.F....

Walt's Disneyland dedication can be found on a plaque near his statue in Disneyland: "To all who come to this happy place, welcome. Disneyland is your land. Here age relives fond memories of the past, and here youth can savor the challenge and excitement of the future. Disneyland is dedicated to the ideals and the hard facts that have created America, with the hope that it will be a source of joy and inspiration for all the world."

About 30 minutes after the Magic Kingdom officially closes, most nights you can see and hear the "Kiss Goodnight", a lights show on the castle, with the replaying of Roy's dedication.

Spaceship Earth in Epcot was constructed in such a way as to have a huge gutter system so that rain water doesn't fall on guests walking below it. Instead, it is tunnelled out to World Showcase Lagoon on the other side of the park.

The people working at the Epcot's World Showcase's 11 pavilions are all residents of those specific countries.

The Moroccan pavilion is the only of the 11 that is sponsored by that country's government - the King himself sent his royal architects to Disney to help make the buildings as authentic as possible.

In WDW's Muppetvision 3D (not sure about Disneyland's), there is a sign at the security desk that says "Back in 5 minutes. Key is under the matt." Lift up the matt, and you'll see that the key is indeed there.

If you visit Star Tours at night, wander through the Ewok village that forms the outer queue, and you will hear the Ewoks chattering to themselves.

The five-animal logo of Disney's Animal Kingdom includes a Dragon because originally, one section of the park was going to be "Beastly Kingdom", devoted to animals that exist only in myth and legend. That section of the park never made it past the drawing board, however.

When Walt opened It's A Small World at Disneyland, he had children from all over the world bring water from their native countries to pour into the attraction.

In WDW's Many Adventures of Winnie the Pooh, as you go through Owl's house, you can see a photograph of the previous occupant of that location - Mr. Toad - handing over the deed to the house to Owl.

You can also find a statue of our dear departed Thaddius J. Toad in the Pet Cemetary at the exit to WDW's Haunted Mansion.

Disneyland's Haunted Mansion contains a "stretching room" that is an elevator which takes you below the train tracks to the main show buildings. Walt Disney World's Haunted Mansion was created inside the tracks, so there was no need for an elevator - but the effect was so loved, that they duplicated it anyway - by having the ceiling raise instead of the floor lower.

After The Magic Kingdom closes, you can go to any of the MK area hotels and sit out on the beach and watch the Electrical Water Pagent - a parade made of lit up floats right on the water.

Forced Perspective is used throughout the parks, to make things look taller or farther than they really are. The 2nd and 3rd floors of the Main St buildings are 7/8ths the size of the floors below them. The bricks on Cinderella castle get progressively smaller as you go up.

Florida state law requires that all buildings higher than 200ft have a red blinking airplane warning light. For this reason, no attraction at WDW is taller than 200 ft (the wand that was on Spaceship Earth from 2000 through 2007 was over 200 ft, but it was already full of blinking lights, so one more didn't matter).

Okay, that's enough. Hope that's enough secrets for you. :-)

1. A private club (Club 33) exists within New Orleans Square
2. On a related note, Club 33 is the only place in Disneyland where you can get 2 ply toilet paper.
3. Disneyland used to deny admission to long-haired male guests
4. Matterhorn mountain houses a basketball county
5. Women bare their breasts for the camera on Splash Mountain
6. Walt Disney's only finished apartment in Disneyland was above the fire house on Main Street. Cast members used to be alerted that Walt was in the park when the light was on in the upstairs window. The light was turned off when he was not in the park. The light now stays on continuously as a tribute to Mr. Disney. (Robyn Mackay)
7. The buildings of Main Street, USA, were built with one idea in mind: leaving the park. All the buildings on Main Street were built using an optical illusion that utilizes making one end of a building slightly shorter than the other end. By using this method of construction, Disneyland created an effect that you don't notice until your tired family leaves the park. The next time you enter Disneyland, make note of the distance that it appears you have to travel to get to the "Partners" statue. Then look at the exit of the park from the statue. That's correct. The distance appears to be shorter entering the park than exiting. The intention was to keep guests from wanting to take the long walk out. Try this the next time you are there. (Robyn Mackay)
8. Walt Disney's Enchanted Tiki Room was originally designed to be a restaurant; that is why there are restrooms in the attraction.
9. The oval mirror in the Mad Hatter's Shoppe will reveal the Cheshire Cat (from Alice in Wonderland) every few seconds. This effect is achieved by using a type of mirror, widely used by law-enforcement, known as a "50%" mirror. The representation of the Cheshire Cat, a solid animatronic piece, is in a room behind the mirror which is left dark. To expose the cat, the room is slowly lit. The image of the cat comes through the mirror and then the room is slowly darkened, making the cat diappear. If a forgetfull cast member forgets to cover the back of the mirror you may just catch them changing the bulbs in the light from the other side of the mirror. (Robyn Mackay)
10. The Matterhorn Bobsleds is an attraction completely unique to Disneyland. No other Disney theme park has this attraction.
11. In the queue of Star Tours, an announcer calls for "Mr. Egroeg Sacul." That's George Lucas backwards.

The best secret: All the hidden Mickeys!

These are the shape of the mouse ears that are hidden all over all of the parks.

My favorite find: The one in the map room in the line for Indiana Jones.

If you have a GPS, something interesting to search for are the Disney survey markers scattered around the parks.