Keep scrolling down for answers and more stats ...
1.
Panama
Many presidents have been, notably Teddy Roosevelt during the Panama Canal construction
2.
North Korea
Donald Trump went into North Korea in 2019, albeit briefly
3.
Libya
No sitting US President has ever been here, a result of turbulent relations over time
4.
Iceland
Nixon and Reagan both made the trip to Reykjavik
5.
Cuba
Barack Obama went in 2016, the first since Calvin Coolidge did in 1928 aboard a battleship
6.
Mongolia
George W. Bush went to Ulaanbaatar in 2005
7.
Ecuador
Herbert Hoover went as a president-elect, but no sitting president has ever visited
8.
Perth, Australia
5 have been to the country, but none have been to the City of Lights
9.
Taj Mahal
Three have made the trip, most recently Donald Trump in 2020
10.
Dominican Republic
As close as it is to the US, no sitting president has ever been
11.
Forbidden City
Donald Trump dined with Xi Jinping at the site in 2017. Obama toured in 2009 as well
12.
Machu Picchu
Some world leaders have been, but no sitting US president
13.
Casablanca, Morocco
FDR went in 1943, the first flight ever conducted on Air Force One
14.
Afghanistan
A handful have been to visit troops, including Bush, Obama, and Trump
15.
Kazakhstan
No sitting president has ever been, nor to its fellow Central Asia neighbors