Surrey City Hall as National City Art Gallery (exterior)
Lyra takes Winn to the art gallery and convinces him that they should break in to have some hot museum sex.
“Star-Crossed” Filming Locations
Mon-El's parents come to town revealing his true identity and Winn is accused of an art theft.
Supergirl episode “Star-Crossed” was filmed in Surrey & New Westminster in Canada.
City Centre Library as National City Art Gallery (interior)
Maggie shows Winn footage of his night at the art gallery but Lyra doesn't show up anywhere on the footage.
Brownsville Pub & RV Park as Jupiter's Rings Trailer Resort
Winn goes to the trailer part to confront Lyra with James's help only to find she has backup of her own.
The Columbia as Moran's
Kara wakes up in a old-timey music hall and is sent onstage to sing.
Source: Lindsay B — Twitter