What begins with T, ends with T and has T in it?

I have cities but no houses, forests but no trees, and water but no fish. What am I?

What has lots of eyes but can't see?

What starts with a P, ends with an E, and has thousands of letters?

What loses its head in the morning and gets it back at night?

What gets bigger the more you take away from it?

What is black when clean and white when dirty?