Diomede Islands are a really interesting place to see because they are two islands of the Bering Strait separated by the International Date Line; there is a difference of 21 hours: while in Little Diomede, that belongs to USA and is on the East side (but near the utmost West side of the Western time-zone emisphere!), it's midday of Monday, in Big Diomede, that is about 3.8 km apart, belongs to Russia and is on the West side (but neat the utmost East side of the Eastern time-zone emisphere!), it's 9 a.m of Thursday!
In the winter, if it hadn't been illegal, you would've been able to walk on ice through the International Date Line. I wish it would be legalized and I wish I go there, sooner or later.
Please correct me if I've made any mistake.