Tolkien also says that the title could refer to other things. That's why Tolkien didn't like the title. Here's some things Tolkien wrote about the title.
"The Two Towers gets as near as possible to finding a title to cover the widely divergent Books 3 and 4; and can be left ambiguous - it might refer to Isengard and Barad-dur, or to Minas Tirith and B; or Isengard and Cirith Ungol."
---JRR Tolkien, Letter 140
"I am not at all happy about the title 'the Two Towers.' It must if there is any real reference in it to Vol II refer to Orthanc and the Tower of Cirith Ungol. But since there is so much made of the basic opposition of the Dark Tower and Minas Tirith, that seems very misleading."
---JRR Tolkien, Letter 143
"1. In a subsequent letter to Rayner Unwin (no. 143), Tolkien is more definite that the Two Towers are 'Orthanc and the Tower of Cirith Ungol.' On the other hand, in his original design for the jacket of The Two Towers (see no. 151) the Towers are certainly Orthanc and Minas Morgul. Orthanc is shown as a black tower, three-horned (as seen in Pictures no.27), and with the sign of the White Hand beside it; Minas Morgul is a white tower, with a thin waning moon above it, in reference to its original name, Minas Ithil, the Tower of the Rising Moon (The Fellowship of the Ring p.257) Between the two towers a Nazgul flies."
---note from Letter 140
Originally posted by Kitoky
Yeah....Orthanc = Isengard and Barad-dur = Mordor
I was under the impression it was that too, I have only read Return of the king, but in the actual movie of The Two Towers, when sauroman is talking into the "eye" he says something about no one can match the armies of Orthanc & Barad-dur
Infact didn't Sauroman mention "the two towers"
Okay guys... the point of this thread is because they AREN'T specified. And Exa, I know that Mordor and Isengard aren't the towers... If you see the Two Towers extended version, it says on one of the discs about them and they aren't specified.
Tolkien wanted lord of the rings to be all one book. It was way too large and it would be so expensive that no one would buy it and that's why the publishers put it into three books. The fellowship of the ring was accepted by him. The Two Towers he thought was okay, but neither he or the publishers specified what the towers were. I know that in the movie Saruman did say that they were Orthanc and Barad-dûr, but not in the book 😉