Arboretum on a cloudy day

The Los Angeles County Arboretum and Botanic Garden, 127 acres (51.4 ha), is an arboretum, botanical garden, and historical site nestled into hills near the San Gabriel Mountains, at 301 North Baldwin Avenue, Arcadia, California, United States. It is open daily and only closes on Christmas Day, hours and admission fees can be found on the Arboretum's website.

Baldwin Lake is a sag pond in the Los Angeles County Arboretum and Botanic Garden, which is in the San Gabriel Valley of Southern California, south of the San Gabriel Mountains. The pond, arboretum, and botanic garden are all within the city of Arcadia.The pond is fed by stormwater and natural springs; water flows out of the pond to the aquifer at Raymond Fault, and on to the Rio Hondo.

Queen Anne Cottage and Coach Barn is a Victorian style pair of buildings at Baldwin Lake, on the grounds of the Los Angeles County Arboretum and Botanic Garden, located in Arcadia and the San Gabriel Valley of southern California.Baldwin built the elaborate Coach Barn near the pond in 1879, and 'Baldwin's Belvedere' or the Santa Anita Ranch Guest Cottage on a peninsula in the pond in 1885−1886.

Hugo Reid Adobe also called Reid-Baldwin Adobe is an adobe home built in 1839. It is currently located at the Los Angeles County Arboretum and Botanic Garden in Arcadia, California. The Hugo Reid Adobe was designated a California Historic Landmark (No. 368) on April 3, 1840. The Reid Adobe was built by Scottish−Mexican Hugo Reid on the shore of what is now called Baldwin Lake with the help of local natives.