Solarium Down the Causeway is the second EP by the Australian alternative rock and post-punk band Witch Hats, released on Z-Man Records in September 2009.

Most of the album was recorded in Oakland, California while the band was on their US tour promoting Cellulite Soul.

[8] The album title is a loose reference to seeing people sun-bathing in the aqueducts of Los Angeles.

[5] In a 2013 interview with the online publication Shanghai 247, font-man and primary songwriter Kris Buscombe recalled firing a 9mm pistol through the roof of the studio during the recording sessions of the EP.

[10] By the time the record was released in 2009, drummer Duncan Blachford had already left the band.