What a wooden structure?

For what was made this miracle wood? Try to guess!




Have you ever wondered when our country had the first submarine?



So it was back in 1721 when Peter I. And then it was called "sanctuary ship." Yefim Nikonov is the one who built the first Russian submarine. Her trial took place in the presence of Emperor Peter I on the lake spill that just outside St. Petersburg. In those places just grew Sestroretsk town, thanks to the construction of an arms factory. Now Sestroretsk resort town. And until recently, about trials in these places first submarine did not resemble anything ... But recently things have changed. This is a replica of the ship itself lurking:



It is inside. The commander of the crew was very Nikonov, and the crew was from 4 to 8 people.

The prototype periscope:



This thing is on the surface of water, and it draws air for breathing:



Link was rowing:





Well, it is a memorial stone and plaque on it:





Source: ibigdan.livejournal.com