There's a place in Scandinavia where the borders of Sweden, Finland and Norway coincide where, in theory, you could run around in a circle declaiming loudly "I'm in Sweden! I'm in Finland! I'm in Norway!".
This point exists but, alas, it is in the middle of a lake.
So, unless the water freezes over, accomplishing this this could prove to be irksome.
Until that is one, or more, of the nations concerned have elected to drop a
lump of concrete into the aforementioned lake at that spot, build a walkway around it, and connect it to its host nations via foot bridges.