Richard Nixon's first law office in Whittier, in the old National Bank of Whittier Building, is now an AT&T "stealth cell site." Makes sense. The building was designed by John and Donald B. Parkinson and is listed on the National Register of Historic Places.

This apartment complex in Hollywood once housed Ronald Reagan's office when he was serving as president of the Screen Actors Guild in the late '40s and early '50s. Back then the building was called the Hollywood Professional Building.

Nearby are the Montecito Apartments—Ronald Reagan's first home in LA. Ben Vereen, Montgomery Clift, James Cagney, and Don Johnson have also lived in the building.

Ronald Reagan also had a Western White House: this ranch north of Santa Barbara that the 40th president also used as a vacation home from the 1970s through the 1990s. Nancy Reagan sold the estate to a conservative group in the late 1990s.

The hotel was a frequent haunt of Reagan's, starting in 1984, when he was the first official guest to stay in its tower portion (now the St. Regis). The hotel's penthouse suite is dedicated to Reagan and his wife, Nancy.

Gerald and Betty Ford commissioned this Rancho Mirage golf course house from architect Welton Becket in the late 1970s. It comes with lots of Secret Service-friendly security amenities and sold in 2012 for $1.675 million.

The LAUSD schools built on the former site of the Ambassador Hotel are named for Robert F. Kennedy, who was assassinated at the hotel in 1968 just after winning the California presidential primary. Interestingly, the school district beat out a group led by current president Donald Trump for the right to develop the site. Trump hoped to build a massive skyscraper on the property, but was foiled when LAUSD obtained the land through eminent domain.

Walter and Leonore Annenberg's Rancho Mirage estate has hosted them all: seven U.S. presidents in total (in 1986, Ronald Reagan made a televised New Year's greeting to Mikhail Gorbachev from the house). The A. Quincy Jones-designed main house and a new visitors' center have now been opened to the public; the operators call it a West Coast Camp David.

Ronald and Nancy's swanky midcentury residence in Pacific Palisades sold in 2013 for a little over $5 million before returning to the market earlier this year as a $33 million megamansion. Home to the Reagans from 1957 to 1981, it's where the Gipper famously received word of his election while in the shower.

The Riviera White House is a sight to see at dusk! #luxuryrealestate #luxury #luxuryhomes #jamanproperties #j8 #dusk #leemanning #backyard #home #losangeles #pacificpalisades #rivierawhitehouse

A post shared by Janus Cercone (@jamanproperties) on Jul 22, 2016 at 5:09pm PDT

It's not a building, but it does have a bathtub installed for FDR. Nicknamed the Battleship of Presidents (and also the somewhat less prestigious-sounding "Big Stick"), the vessel—now permanently moored off of San Pedro—has hosted Ronald Reagan and George H.W. Bush in addition to Roosevelt.

Riverside's Mission Inn is one of the most distinctive and unique buildings in all of California, and it's also hosted a boatload of presidents over the years—nine in total. The hotel even has a presidential lounge to commemorate the spot where Richard and Pat Nixon were married back in 1940. In addition to all the presidents, the hotel's impressive guest list also includes the likes of Albert Einstein, Susan B. Anthony, and John D. Rockefeller.

Kennedy officially received his party's nomination at the late Los Angeles Memorial Sports Arena, at that time a brand new, state-of-the-art facility.

Trump has owned this Beverly Hills home since 2007 and hosted fundraisers here while campaigning for president. It's right across the street from the Beverly Hills Hotel—another famous (and now, possibly infamous) Trump retreat.