Yes..there's an interesting book called "Death by Black Hole" by Neil DeGrasse Tyson that I read a while ago. It's not just about Black Holes but about physics quandaries and stuff about gravity and space. The author said something like El Goorf and Zotoaster did.
Quote: "If you stumbled upon a black hole and found yourself falling feet-first toward its center, then as you got closer the black hole's force of gravity would grow astronomically. ..While you fall, the black hole's force of gravity at your two feet, they being closer to the black hole's center, accelerates them faster than does the weaker force of gravity at your head...Your body would stay whole until the instant the tidal force exceeded your body's molecular bonds. That's the gory moment when your body snaps into two segments, breaking apart at your midsection. Upon falling further, the different in gravity continues to grow, and each of your two body segments snaps into two segments. Shortly thereafter, those segments each snap into two segments of their own, and so forth..."
It's quite a fun book to read, he has a great sense of humor:
Quote: "To all the words in the English language that describe ways to die (e.g., homicide, suicide, electrocution, suffocation, starvation) we add the term "spaghettification.""
Surprisingly, he goes on to add that only very small black holes are able to "spaghettify" people. This is because
Quote: "the tidal force on you is greatest if your size is large compared with your distance to the center of the object"
To actually answer some of the questions:
What is it made of? Densely compacted matter from surround stars and spaghettified people
Where does it lead to? Nowhere, really, just a very dense ball of matter that you will smash into at a very high speed.
What size is it? Black holes vary greatly in size - the size is directly proportional to their mass, or how much matter they suck in.
