Scott S. Warring, author of UFO Daily, reviewed photos Mercury made by NASA and discovered this unusual black door. It is long in the shape of a rectangle; all four corners inside are the right ones. If the planet was beaten by rectangular meteorites, then this, It seems that the ancient aliens were engaged. 
Photos from open sources
So NASA notes the “crater that just appeared in the center of the photograph is 42 km (26 miles) in diameter, “- this gives us approximate doorway size. To cross the entire crater we need 7.5 door sizes, that is, the doorway itself has size 5.6 km in length, or 3.4 miles. This is a giant door for giant ships traveling here. Check it out for yourself source below.
A photo from open sources
A photo from open sources
NASA Mercury
