Russia
At 540m tall this rocket shaped tower is a staggering relic from Russia's communist past and a breathtaking way to begin to understand the size and magnificence of Moscow. I visited in December, it was -20ºc but perched way above the clouds the views are stunning and sun was beating down into the observation deck at the top of the tower.
Google map: bit.ly/a3lcU2
en.wikipedia.org/wiki/Ostankino_Tower