Here is a list of all experiences and how to unlock them.

Default	Sunset Beach	Welcome To Marapets
This is a default experience given to all players	This is a default experience given to all players	This is a default experience given to all players

Autumn Trees	Birthday Party	Castle Heatwave	Cherry Blossom	Christmas Eve
Maybe Retired, I don't know. It was recieved from completing the Gurple quests at Thanksgiving. This has been replaced by Twitter the last few years, and should still work I'd think. Twitter can be found in place of Talon during the event.	Open a Birthday Party Bag from Mara's 18th Birthday. It may work with other Birthday Party Bags but I don't know for sure.	Only found during a Heatwave event when you play Windmill and then return to the Windmill page.	Complete all 75 levels of Sushi Slice and go back to the page.	Open a 2015 Chrismas Present from Secret Santa. It may also work with newer presents, I don't know.
Circus	Cursed	Easter Egg Hunt	Evil Clowns	Happy Hour
Open a Circus Treasure Chest	During the Cursed Clock Tower event at Halloween time your pet must gain 3 stats from the Cursed Clock Tower.	Collect your Easter Eggs after finishing the Easter Egg Hunt.	Complete all levels of Evil Clowns, then return to the Evil Clowns page. I have the video solutions on my game solutions pages, if you need the link please contact me.	Complate all 4 episodes of Happy Hour, then return to the Happy Hour page. I have the solutions on my game solutions pages, if you need the link please contact me.
Island Pier	Kamilah Desert	Marvelous Rainbow	Moonlight	Moonlight Graveyard
Buy a treasure map piece from the Treasure Map shop.	Open a Desert Treasure Chest.	Use the Colour My World avatar. You get the Colour My World avatar from opening a Rainbow Treasure Chest.	Visit Kamilah Desert during Mara's night time. It is night on Mara during odd hours Mara time.	Find the Bolimo in the Open Graves game in Undying Woods.
Murcer	Neon Lights	North Pole	Northern Lights	Palladium Jubilee
Wear any Trick or Treating approved Halloween costume on your Character. You can find a list in the news if you search Trick or Treat.	Complete all 40 levels of Blackout then return to the page. I have all the solutions for Blackout on my game solutions pages. Please mail me for the link if you need it.	Visit the Advent Calendar in December after receving your price.	Open a Winter Treasure Chest.	View The Trickster page when you has a sequence of 3, 4 or 5 balloons during the Palladium Jubilee event in March 2020. RETIRED.
Paradise Beach	Peaceful Reef	Pool Party	Potion Debacle	Prehistoric Marada
Complete level 15 of Minipet Island Goals.	Buy any item from the Sushi shop in Jenoa.	Open a Pool Treasure Chest.	Use any Enchanted Quell Plushie or Quell Potion on your pet.	Use a Stone Age Costume on your pet.
Raging Storm	Royal Palace	School	Sleepy Blackout	Spooky
Use the Telescope during a Storm weather event.	Open a Royal Treasure Chest.	Start any session in School when your pet gets free school from Wise Walee.	Use a Sleepy Costume on your pet.	Click a pumpkin during the Pumpkin Hunt Event during Halloween time. You may have to receive a prize, I don't know.
Spring Day	Tornado	Underwater	Valentine's Day	Winter Wonderland
Open a Spring Treasure Chest.	During Lost Sock Awareness day event, complete Shusan and win a pair of socks for yourself as well.	Use an Underwater Costume on your pet.	Complete a Candy Tree quest during the Valentine's Day event. It is random.	Use a Tundra Costume on your pet.
Wonderland	Work From Home	Wrong Direction	Yellow Brick Road
Add the Wonderland Door to your wardrobe. You can find the Wonderland Door in the Wonderland Treasure Chest.	Collect pet wages from the Job Center during a Drizzle Event.	Buy any compass from the Compass Shop.	Open a Wonderful Wizard Treasure Chest.