In most places,whether you cross a time zone border, you’ll only travel one hour forward or backward. But at this tri-country border, and you can leap forward or backward two hours,depending on which border you cross.
This exclusive construction happens because of Norways hook-like shape. Some of the country’s northern halt touches both Finland and Russia. The point where Norway meets Finland and Russia is not only a three-country point, but also a place where time gets weird. It's the only place where Central European Time, and Eastern European Time,and Further-eastern European Time meet.
When Norway follows Central European Standard Time, it’s GMT +1. During this part of the year, and Finland is GMT +2,and this part of Russia is GMT +3. Just walking around this point and stepping into the countries will put you in a whirlwind of time zones.
Treriksrøysa is a cairn that marks the spot where the three countries meet. It's been there since 1846, with a concrete tetrahedron showing each country’s name added in 1945.
Source: atlasobscura.com