That whole area (Laurel Canyon) is one whole whacked out area. The next time I'm in LA I'm going driving through it including the Wonderland house.
It was the neighborhood where a lot of well-known musicians in the 60s lived. This is just a synopsis of the area from Wikipedia but there have been whole books written about it:
Laurel Canyon became a nexus of counterculture activity and attitudes in the mid-late 1960s and early 1970s, becoming famous as home to many of L.A.'s rock musicians, such as Cass Elliot of the Mamas & the Papas; Joni Mitchell; Frank Zappa; Jim Morrison of The Doors; Carole King; The Byrds; Gram Parsons; Buffalo Springfield; Canned Heat; John Mayall; members of the band The Eagles; the band Love; Neil Young; Brian Wilson of The Beach Boys as well as James Taylor, Jackson Browne, J. D. Souther, Judee Sill, Linda Ronstadt and Stone Poneys, Ned Doheny, Bonnie Raitt, Linda Ronstadt, Harry Nilsson;[41] and Micky Dolenz & Peter Tork of The Monkees. Cass Elliot's home was considered one of Laurel Canyon's biggest party houses with all-night, drug-fueled sleepovers, well attended by the hippest musicians and movie stars of the era.[42]
John Phillips, also of the Mamas & the Papas, took inspiration from their home in Laurel Canyon for the song "Twelve Thirty (Young Girls Are Coming to the Canyon)", released in 1967. The following year, blues artist John Mayall recorded and released the album Blues from Laurel Canyon based on his experiences during a vacation that he spent in the Canyon.
The area and its denizens served as inspiration for Joni Mitchell's third album, Ladies of the Canyon, released in 1970. The house she lived in was immortalized in the Crosby, Stills, and Nash song, "Our House" (1970), written by her then-lover Graham Nash. The group is reputed to have met and first sung together in Mitchell's living room.