GMOD TTT server where are maps located?

I am making a TTT cmd dedicated server for about 4 friends and I to play on.

I am following these videos to make the server.

I know that I need .bsp map files, but I seriously have none in the maps folder of my server. The most I have is a bunch of .txts. Where are maps located?

There are no default maps for TTT.

Thought there were. Suppose I will get some from the workshop then and add them to the server.

garrysmod/maps