Donald Trump posing with a guest at Mar-a-Lago. blairbrandt/Instagram

President Donald Trump has spent more than a quarter of his early presidency at his Mar-a-Lago club in Florida.

And with Trump spending weekends both hosting world dignitaries or simply unwinding and playing golf at his resort, a critical source has emerged for news on Trump's whereabouts: Instagram.

On the "Mar-a-Lago" geotag on the social-media site, club members and attendees have posted photos providing public details of Trump's days that otherwise may have gone completely unnoticed outside of the high-society Floridians who saw them firsthand.

The photos — whether taken of prominent guests or Trump family members visiting what the president calls the "Southern White House," of the surroundings, or of Trump himself — show moments that even those in the protective press pool assigned to cover the president have, at times, not been privy to document themselves.

In total, Trump has spent 25 of the first 89 days of his presidency at his Florida club, where he's hosted guests like Japanese Prime Minister Shinzo Abe and Chinese President Xi Jinping.

The weekend with Abe featured some of the more important Instagrams posted from the resort. They included Trump looking into the camera with his head on his hand as aides behind him stood as both US and Japanese officials were coordinating a response to a North Korean missile launch. A national-security crisis was taking place, and the response was being discussed in full view of the many club members and guests assembled in a dining area.

In an interview with the Irish Independent, Eric Trump, the president's son, said Mar-a-Lago "has been a very effective tool for [my father] to go down and get to know somebody while not sitting — no different to you wanting to sit next to me on this couch today — not sitting across a wooden partition, which instantly makes a relationship more strenuous."

He compared the resort to President George W. Bush's Crawford, Texas, ranch.

"Bush brought foreign leaders from all over the world [there]," he said. "He would go down to the ranch and they would drive a truck around and they would have fun and they would eat and that was his way of bonding."

An Instagram spokesperson told Business Insider it could not provide data on whether use of the Mar-a-Lago geotag had increased since Trump was inaugurated on January 20.

Here's a look at some of the most interesting photos from the resort that users have posted to Instagram at Mar-a-Lago:

A post shared by Sofia (@sofiabaratashvili) Mar 15, 2017 at 10:29am PDT

Eric Trump posed with a couple of guests at the club in mid-March.

Don 👑 king A post shared by William Marudas (@burkejack367) on Mar 5, 2017 at 7:11pm PST Mar 5, 2017 at 7:11pm PST

A guest posed with boxing promoter Don King, a controversial Trump supporter who was barred from speaking at the Republican National Convention, in early March. King has made multiple appearances at Mar-a-Lago since Trump won the November election.

When DJT crashes your luncheon 😎 #makingamericagreatagain #twiceinarow A post shared by Kacie (@kcskingdom) on Feb 20, 2017 at 10:58am PST Feb 20, 2017 at 10:58am PST

Trump spoke at a Mar-a-Lago luncheon before club members in mid-February.

Such an honor to meet Dr. Charles Krauthammer!! What a brilliant man!! #maralago A post shared by Alexa Bartusiak (@bugonthebeach) on Feb 27, 2017 at 6:30am PST Feb 27, 2017 at 6:30am PST

In late February, conservative columnist and Fox News pundit Charles Krauthammer, visiting Mar-a-Lago, posed with a guest.

About Last Night: Catching up with the one & only Don King! A post shared by LANA MARKS (@lanamarkshandbags) on Mar 5, 2017 at 4:01pm PST Mar 5, 2017 at 4:01pm PST

King appeared with a guest during his early March visit to the West Palm Beach club.

I didn't take it! Really mr. Secrete service man it wasn't me!! Hehe A post shared by Cameron Keating (@cameronkeatingpb) on Feb 19, 2017 at 7:59am PST Feb 19, 2017 at 7:59am PST

A Mar-a-Lago guest took a photo of Trump's place setting at a dining table in mid-February.

The guy that Alec Baldwin plays on SNL made a guest appearance at #FalkLindnerWedding VC @chadblackburn1 #trump #maga #maralago #winterwhitehouse #FakeNews said he "crashed" the wedding, but he was an honored guest. #HuffingtonPostIsFakeNews #sloppyjournalism A post shared by Acat (@acat2002) on Feb 12, 2017 at 9:56am PST Feb 12, 2017 at 9:56am PST

Trump was documented making an appearance at a Mar-a-Lago-hosted wedding in early February. An onlooker wrote: "The guy that Alec Baldwin plays on SNL made a guest appearance at #FalkLindnerWedding."

King of Pop Art with the Presidential Limo. Of course. We like to start at the top...and work our way up. Always! @brittopopart #Romero #Britto #RomeroBrittofineartgallery #RomeroBritto #BrittoTeam A post shared by Robyn Tauber (@robyntauber) on Feb 12, 2017 at 7:04am PST Feb 12, 2017 at 7:04am PST

A frequent sighting on the Mar-a-Lago geotag, guests and those near the club taking photos with the presidential fleet of vehicles. Here's one man taking a photo with "The Beast" in early February.

Such an honor to meet our 45th President last night #MAGA A post shared by King Kendall (@kendall_lynsi) on Feb 11, 2017 at 11:12am PST Feb 11, 2017 at 11:12am PST

Trump mingled with guests during a February visit.

The president and first lady Melania Trump took a photo with a Mar-a-Lago guest during Trump's first visit to the club during his presidency in early February. This trip featured his meeting with the Japanese prime minister.

A Selfie with The First Lady... Imagine That! #chasethomaspalmbeach #celebritystylist #lotushairstudiowpb #melaniatrump #firstlady #gratitude A post shared by Chase Thomas (@1chaseyourdreams) on Feb 5, 2017 at 11:16am PST Feb 5, 2017 at 11:16am PST

And here's Melania with a guest during that same weekend.

Mr Sunshine Eddy Shipek Red Cross Ball Mar A lago Palm Beach Winter White House President Donald Trump A post shared by Eddy Shipek (@eddyshipek) on Feb 4, 2017 at 6:27pm PST Feb 4, 2017 at 6:27pm PST

White House chief of staff Reince Priebus was there, as well, taking a photo with a guest.

Best birthday weekend ever!!! 😎🤗😜🎉🎊 #maga #makeamericagreatagain #HangingOutWithThePresident #donaldtrump #potus #maralago #HappyBirthdayToMe #apmfm #apmotorworks #soflo #redcross A post shared by Ap Motorworks (@apmotorworks) on Feb 4, 2017 at 5:54pm PST Feb 4, 2017 at 5:54pm PST

Another guest took a photo with the Trumps, calling it the "best birthday weekend ever!!!"

The President waved! #potus #presidenttrump #palmbeach A post shared by Ryan Gartner (@lilryan10788) on Apr 16, 2017 at 6:16pm PDT Apr 16, 2017 at 6:16pm PDT

An onlooker caught Trump waving from his motorcade during his most recent trip.

Not a great shot but 10 feet away#trump #presidenttrump A post shared by Richard Steinberg (@rsteinberg4) on Apr 15, 2017 at 4:58pm PDT Apr 15, 2017 at 4:58pm PDT

Here's a shot of Trump speaking to guests during an Easter visit.

Louie making new friends. 🇺🇸 #potus @realdonaldtrump #louielaurence A post shared by Blair Brandt (@blairbrandt) on Apr 15, 2017 at 7:04am PDT Apr 15, 2017 at 7:04am PDT

And here's Trump taking a photo with a guest and a child during that trip.

Shhhhuuuhhhhhhhh #airforceone A post shared by Javi (@javisilva_x) on Apr 8, 2017 at 4:09pm PDT Apr 8, 2017 at 4:09pm PDT

This man got pretty close to Air Force One last week in West Palm Beach.

Someone else had their photo taken with "The Beast" last week.

#MAGA #USA ☆☆☆ A post shared by Rachel (@soflagurl) on Mar 24, 2017 at 3:04pm PDT Mar 24, 2017 at 3:04pm PDT

A few people held up a "Trump 2020" sign with "Deport ILLEGAL CRIMINALS ... Before they become LEGAL LIBERALS" written on it. The photo, taken a handful of weeks ago, was at the Mar-a-Lago club.

Here's Trump opening up the door of his van just outside his Florida club last month.

#donaldjtrump #valentinaaved #maralagopalmbeach #valentinastreasures326 #12018384838 villavalentina.123look.com A post shared by Valentina Deva (@realtorvalentina) on Mar 19, 2017 at 1:07pm PDT Mar 19, 2017 at 1:07pm PDT

Trump mingled with onlookers outside of his van in mid-March, near Mar-a-Lago.

At #maralago with #vicepresident #mikepence A post shared by Nick Loeb (@nickloeb) on Mar 18, 2017 at 6:17pm PDT Mar 18, 2017 at 6:17pm PDT

Notable Republican financier Nick Loeb with Vice President Mike Pence last month.