The Broad
A contemporary-art anchor on Bunker Hill. The collection is free to visit; special exhibitions can have separate tickets.
Notes from the cityLos Angeles
Free entry is a good start. Check reservations, special exhibitions and the cost of getting there before deciding on the day.

Levi Clancy / Wikimedia Commons, 2015. Resized and compressed; display crops vary. · CC0: License; Source
A free outing begins with choosing the part you actually want. A collection, a special exhibition and a planetarium show are different experiences, even when they share an address.
The Broad’s collection, Getty Center, Hammer Museum and Griffith Observatory offer free admission, with different arrangements. Getty requires a timed reservation; the Hammer does not require one for individual visitors. Special exhibitions at The Broad and planetarium shows at Griffith can cost extra. Parking is a separate consideration.
Plan the journey as carefully as the attraction. Starting nearby, comparing transport options and leaving room for one good visit can matter more than filling a day with distant stops. The linked place records and official sources help you make that choice.
A contemporary-art anchor on Bunker Hill. The collection is free to visit; special exhibitions can have separate tickets.
Art, pale stone and space to look out over the city. Free admission, with a timed reservation and a separate parking charge.
A view across Los Angeles and a reason to look up. The observatory building and grounds are free; planetarium shows are separate.
A free art visit in Westwood, with exhibitions that reward curiosity. Make one show the centre of an afternoon.