10 drawings that show how different objects look in cross-section (11 photos)
We are used to seeing the objects around us only from the outside, some are impossible to see otherwise, but their hidden structure can be extremely fascinating. Internal mechanisms, structures and details often amaze with their perfection and complexity 
"Turtle" - the first combat submarine, USA, 1775 
From the Inside of Three Generations bulbs 
Location of seats for spectators in the Colosseum 
Diving costume 
How the mechanism of the theater prompter worked in the 19th century 
Soviet Antarctic all-terrain vehicle "Kharkovchanka", 1958 
How the fortress and buildings are located on the famous Mont Saint-Michel island in France 
The Earth Inside, by Matthew Attard 
Inside a ball turret - a spherical gun mount 
These were used on some American airplanes during World War II.
Inside the Elbphilharmonie, Hamburg 
The cost of building the philharmonic was $820 million.
