Of the many fascinating aspects of HBO's explored in season 3, but before viewers can dive in, it's probably best to refresh yourself on what we know of the established parks.
Showrunners Jonathan Nolan and Lisa Joy have adapted author Michael Crichton's 1973 directorial debut film Westworld, into a mind-bending, philosophically-dense, action-packed HBO series of the same name. Westworld takes place in the near future, where technology has advanced to the point where humans have been able to create Turing test-ing robots which now populate theme parks run by Delos Destinations. Inside these parks, human guests can do whatever they wish to and with the robots (referred to as Hosts on the show). Things had been running smoothly inside the Delos parks for decades. Then, the Hosts gained sentience, leading to a revolution that may or may not end with the downfall of Delos and the Hosts assimilating into the real world.
To date, three of the Delos parks have been shown to varying degrees of detail on Westworld. Those parks are Westworld, The Raj, and Shogun World, the latter two parks having been in season 3 or a future season.
Westworld
Westworld is ground zero for all of the action in the show and the crown jewel of Delos' creations. This was the first park, created by Robert Ford and his business partner, Arnold Weber. During its peak, a record 1,400 guests flocked to the Westworld park. Westworld is one of the bigger parks Delos offers to its guests, with multiple towns and open terrain available for the guests to explore. Its mentioned at one point that it costs a jaw-dropping $40,000 per day to visit Westworld, giving viewers a sense of the level of privilege required to experience the park's many offerings.
There are truly no rules in Westworld, making it an attractive option for those guests looking to let loose, give in to their vices, and maybe even do unspeakable things free from consequence. Park guests cannot be hurt by gunfire nor can they be physically harmed by a Host; the guests can, of course, do those things free from judgment. Westworld also caters to families, so there are milder activities on offer. It's shown throughout Westworld's run that the town center guests step into when they get off the train is the tamest part of the park, getting more dangerous and lurid the further out one travels.
Multiple storylines and possible experiences are shown in seasons 1 and 2. A guest's adventures depend on which hosts they interact with. For example, one storyline involves Teddy (James Marsden) hunting down the notorious killer Wyatt, who is on the lam with his gang out in the Westworld wilderness. Another storyline lets parkgoers work with Lawrence (Clifton Collins), a criminal working out of the Westworld town of Pariah, who tries to reel you into an adventure involving a train robbery. The park guest is in control in Westworld — interesting in theory but unnerving to watch play out on the show.
The Raj
Westworld season 2. It's a unique park for a number of reasons, one of the most immediate being its name is styled differently to the rest of Delos' offerings. The Raj's theme recalls colonial India when the rule of the British Crown was felt in every aspect of society, from the laws to the social structure to the arts and culture. This is all recreated for Raj park guests in period-accurate detail. In real life, this rule of the "British Raj" lasted from 1858 to 1947. The style of clothing and buildings in The Raj imply this Delos park focuses on the 20th-century portion of this time period. It's worth noting there's something unsettling about many of the park's guests being white and getting served by Hosts of color. Delos clearly hasn't thought through the optics of this aspect of The Raj experience.
The Raj is billed to be a markedly more relaxing affair, with a hotel and spa at the center of the park and more dangerous adventures located in the jungles the further you venture out from the park center. Those adventures include being guided by a Host one a hunt through the jungle for exotic animals (like tigers), and camping in fashionable tents for extended periods of time. Guests get to ride on elephant out to that part of The Raj's park grounds or walk.
Westworld, unfortunately, doesn't spend too much time in The Raj. The park is introduced merely as a way of bringing William's daughter, Emily (Katja Herbers), into the story. She is first seen as a park guest trying to suss out the whereabouts of her father, but not before seducing a Host and killing him.
Shogun World
Shogun World was featured in Westworld season 2. This Delos park is modeled on the Edo period in Japan, which lasted from approximately 1603 to 1868. In the real world, Japan during this period was under the rule of the Tokugawa shogunate, the last feudal Japanese military government. This might explain why there is such a strong military presence in Shogun World. The actual Edo period was characterized by isolationist politics, growth in the arts and culture, a "no more wars" mentality, and strict social order. Aspects of this were exhibited in Shogun World, like Akane's (Rinko Kikuchi) dance for the Shogun World Emperor.
Delos employee Lee Sizemore (Simon Quarterman) its during his time with Maeve, Hector (Rodrigo Santoro), Armistice (Ingrid Bolsø Berdal), Sylvester (Ptolemy Slocum), and Lutz (Leonardo Nam) in Shogun World that he cribbed heavily from many of Westworld's more popular storylines in order to bring this park to life. This ission happens when the group is captured in the woods outside Shogun World and brought into the park's village hub. They all witness the same robbery scene which typically kicks off another day in the Westworld town of Sweetwater. The big difference is, instead of Hector and Armistice leading the fights, warrior Musashi (Hiroyuki Sanada) and Hanaryo (Tao Okamoto) oversee the robbery of the geisha house kept by Akane. The storyline, transposed from one park to another, implies the experience for park attendees might feel quite similar to the experience one would have in Westworld.
One gets the sense that if this opening robbery scene is the same, then Shogun World parkgoers have the option to go on similar adventures as Westworld parkgoers, including heading off into the woods on the outskirts of Shogun World to take on a notorious criminal (just like the Wyatt storyline). It would still feel different and exciting, no doubt, as the look and feel of this world are vastly different from the Wild West. One notable difference that makes Shogun World standout from the rest is the presence of shogun warrior Hosts, who are seen engaging in dazzling, brutal, sword-centric fights with Musashi.
War World
A new park was revealed in the Westworld season 3 trailer: War World, a Nazi-occupied town in rural Italy. It looks like a fully-realized park that is already in operation, with army tanks in the streets and the townsfolk all rounded up in the square. Other shots from the season 3 trailer hint at era-specific planes, clothing, and other objects from the era also being deployed in this park experience.
It also seems like guests would be able to choose whether they want to run with the Nazi soldiers (yikes) or hang with the locals as part of their experience. Maeve is one of the many Hosts in this park but it's unclear ahead of season 3 how she got there. It's possible other familiar Hosts will be revealed in this park over the course of the season. The intricacies of this park are still unknown, including how big it is and what kind of storylines will play out during a typical day. The trailer does preview Maeve punching a Nazi soldier (guest or Host, who's to say?), which means tensions will be running high in more than one way in War World.
Delos Park 4 And 5
There are two parks that have yet to be revealed on Westworld but their existence is confirmed on the Delos website. Under the "Experience" tab on the site, s have the ability to scroll through and see the various parks. Ahead of season 3, all of the known parks are clearly featured. There is one park whose photo is still obscured but it looks like there are buildings and planes similar to the ones see in War World.
These two unknown parks — referred to as "Park 4" and "Park 5" on the website — will undoubtedly be unveiled at some point in Westworld's run. As of July 2019, it was reported HBO has potential deals for seasons 4 and 5 in the works with Nolan and Joy. If those fourth and fifth seasons materialize, it stands to reason the other parks would be revealed, with one new park for each respective season. There's still plenty of park options to choose from, especially if Nolan and Joy want to look to Crichton's Westworld for inspiration. Other parks mentioned in that film are Medieval World, styled like medieval Europe, and Roman World, which is made to recall the Roman city of Pompeii. Both worlds would certainly add some flare to HBO's Westworld, right?