|“||This is A's lair.||”|
A's lair is "A's" base of operations. It is where "A" would go to think of plans, send texts, create messages, and find ways to torture the girls.
- Lost Woods Resort (Room 2) - pre-Season 1 to Season 2
- Apartment building on Mayflower Hill (Room A) - Season 3 ("The Kahn Game" - "Dead to Me")
- A rented RV - Season 3 to Season 4 ("Will The Circle Be Unbroken?" - sometime after "'A' is for A-l-i-v-e")
- An apartment building - Season 5 ("Miss Me x 100" - onwards)
- Basement of Campbell Barn - (Set up by "A" to frame Andrew, unknown how long but stopped its use after "Welcome to the Dollhouse")
- A's Dollhouse - (unknown how long but stopped its use after "Game On, Charles")
- A lair where "A" and Red Coat teamed up in "FrAmed".
- The Carissimi Group (occasionally).
In the Season 2 finale, it is revealed to be located in Room 2 of the Lost Woods Resort. The room contains pictures, newspaper clippings, and dolls resembling the girls and Alison. There is a hole in the wall behind a picture frame so "A" could watch Alison in Room 1 next door. This is where Spencer figures out Mona is "A," due to the gum wrapper and cashmere sweaters. It is also where Mona reveals herself to be "A" and knocks Spencer out.
In the Season 3 premiere, it's revealed that when the girls came back to the lair the morning after the masquerade ball, the room was empty. They didn't tell Emily about it until 5 months later. Over these months, Spencer had been visiting the empty room in order to create a computer-generated 3D representation of the way it had been when she first saw it.
The new "A" searches for a new place to create his/her lair when he circles a classified ad for a room for rent.
At the end, "A" rents the apartment (Room A).
"A" moves in at the end.
The new lair, complete with all the photos and paraphernalia taken from Mona's Lost Wood's lair, is revealed when Mona is seen talking to the new "A."
It is revealed as apartment A in a block of apartments on Mayflower Hill. Spencer finds the second lair, but "A" has realized that the Liars now have the key, and has relocated, leaving the room empty.
"A" is seen looking at a poster of Rosewood's Carnival at Rosewood Town Center, then "A" closes the laptop and "A" is seen opening the blinds of a mobile home and then driving it throughout Rosewood.
We see two (now former) members of the "A-Team", Mona and Spencer in the mobile hideout of "A".
A's lair is still a mobile RV and Mona takes the four liars there. She and Hanna hide it later, but Toby takes it to A in exchange for information about his mothers death. The Black Widow is later seen in the RV.
Red Coat (CeCe) is in there talking to someone and waiting for them to arrive and she says she will not come back to Rosewood.
Red Coat (Alison) leads Spencer to an apartment. This isn't A's lair. It is just a room used by Ezra to research Alison for his book.
Uber A moves her lair to an apartment building while the Cavanaugh house is blown up.
The Liars find themselves in an unknown location that looks like a bunker turned into a dollhouse where most rooms look like their old rooms. They also find Mona alive and a vault with A's personal belongings.
A's lair is revealed to be the basement of the Campbell Barn. Linda Tanner and Toby discover it and see the girls trapped in the dollhouse on their computer monitors.
The farm was set up by A to frame Andrew so the police would chase him instead of A.