In some regards, the demilitarised zone, a tensely guarded strip of land at the 38th parallel that has divided the peninsula since the 1953 Korean War armistice, has long been regarded as an obvious choice to hold diplomatic talks between the United States and North Korea.
But some Trump aides had been wary of having the President travel to meet Kim so close to his own turf, lest it appear too deferential and come off as a meeting between equally powerful world leaders. Other foreign policy analysts speculated Trump would want a grander setting than the gritty demilitarised zone.
But the Moon-Kim meeting produced astonishing images of the two leaders shaking hands across the dividing line before stepping, in turn, back and forth over the line together - a symbolic, but emotionally powerful moment for many South Koreans who have relatives living in the North.
Trump's embrace of the site could carry some risk given that a "celebration" during his summit with Kim could be premature.
White House aides have expressed scepticism in private of Kim's motives, given North Korea's history of violating past deals aimed at stunting its nuclear weapons and ballistic missile programmes.
"Maybe a lot of things will change, but Kim Jong Un has been very open, very straightforward so far," Trump said.
"I can only say 'so far,' but he's talking about getting rid of the [nuclear testing] site. He's talking about no research, no launching ballistic missiles, no nuclear testing. He has lived up to that for a longer period of time than anybody has seen."
His comments were the most specific to date about the logistics of the meeting, which Trump said has the potential to be celebratory in tone.
Trump said last week that a site for the historic meeting had been narrowed to two or three possible locations, with speculation focusing on other countries in the region. Mongolia and Geneva, were also said to be under consideration, along with Singapore.
"Numerous countries are being considered for the MEETING, but would Peace House/Freedom House, on the Border of North & South Korea, be a more Representative, Important and Lasting site than a third party country? Just asking!" Trump wrote on Twitter.
At the news conference, Trump said that "the good news is, everybody wants us. This has a chance to be a big event."
Trump, who rose to prominence as a real estate promoter and former reality television star, has frequently boasted about the size of his rally crowds and other metrics based on the optics of his events.
On numerous occasions he has taken credit for a "successful" Winter Olympics in PyeongChang, South Korea, asserting that his focus on North Korea, which sent a delegation to the Games, helped drive up ticket sales.
At a campaign-style rally in Michigan at the weekend, Trump told the audience that he expects to meet Kim in the next three or four weeks.
Experts have noted that any deal between Trump and Kim is likely to be an overarching statement of common goals rather than a detailed agreement that provides a road map toward eliminating North Korea's nuclear programme.
Those details, including such difficult issues as ensuring compliance through inspections and the potential lifting of economic sanctions on the North, would have to be worked out in subsequent meetings between the two countries, as well as South Korea, China, Japan and the United Nations.
At the news conference, Trump reiterated a previous pledge to walk away from the summit with Kim if talks do not go well. "Got to get rid of the nuclear weapons," Trump said. "If it's not a success, I will respectfully leave. It's that simple."
Patrick Cronin, an Asia-Pacific security analyst at the Centre for a New American Security, said the demilitarised zone makes sense in part because that area just staged a successful inter-Korea summit and because Kim is said not to want to travel too far from home.
"It's a lot of theatrics," Cronin said.
"Don't overthink the substance. This process has momentum and Trump wants to continue the theatrics to continue the momentum to see if we have a turning point here. It's up to Trump to keep the momentum going to see if diplomacy can work."
