Disneyland is the happiest place on earth, but there are a few secrets hidden throughout the park.

It took an act of Congress to install the Presidential Seal in the “Hall of Presidents” attraction. There are only three seals: one in the Oval Office, one in the hall containing the Liberty Bell, and one in the “Hall of Presidents.”

The 14-story “Tree of Life” in the middle of Animal Kingdom is actually an old oil rig.

The colored concrete walkways in the Magic Kingdom seem to correspond to each section — but they’re actually colored because Kodak and Disney did a study and found that light reflecting off colored concrete creates more vivid photographs.

You can see a dragon on the signs for Animal Kingdom, and a dragon’s head hanging above the front gates. They were there to represent a scrapped area called Beastly Kingdom, which was going to be dedicated to mythical animals.

In the second story windows of “Hall of Presidents,” you can spot two lanterns. They are referencing the line “One if by land, and two if by sea” from Henry Wadsworth Longfellow’s poem “Paul Revere’s Ride.”

In the United Kingdom pavilion, the Rose and Crown got its name from the two most common words found in pub names in the United Kingdom.

On the “Dinosaur” ride in Animal Kingdom, there are three pipes in the queuing area with chemical formulas printed on them. The formulas on the pipes are for ketchup, mustard, and mayonnaise.

The aquarium in “The Seas” is so large that the “Spaceship Earth” sphere can fit inside it.

In Colonial America, plumbing had not yet been invented. The brownish winding path in Liberty Square is meant to represent the sewage that flowed down the streets in that time.

On Tom Sawyer Island, there are a few paintbrushes hidden around the place. If you find one and hand it into the barge driver, they’ll give and your party free fast passes for one ride.

The futuristic palm trees in Tomorrowland actually fold up at dusk, and unfold at dawn.

Epcot was originally designed to be a model community and home to 20,000 residents.

If you look closely at the hieroglyphics in theIndiana Jones sections of the “The Great Movie Ride,” you’ll see Mickey and Donald, and C-3PO and R2-D2.

Look down when in line at “The Haunted Mansion,” and you might spot a wedding ring embedded into the concrete. It’s believed to belong to the hanging bride who you see on the ride.

The Main Street windows of Disney Land are covered in the names of families who sold their land to Disney. In Disney World, they’re covered in the names of the shell companies that Disney used to buy the land.