Get the position of the particular tile involved in a TileMapCollider collision?

Hi there,

I'm working on a 2D platformer where ease of workflow is very important to me. I think the Unity TileMaps together with TileMap Colliders system is great and I would love to use them.

I am looking to implement ladders in my game - whereby the player will lock on to the ladder's x-position if she is climbing one.

Currently I have a TileMap specifically for ladders with a TileMapCollider2D attached, and "Is Trigger" is checked.

Currently what I need is a way to get the position of the particular tile the player is colliding with when this OnTriggerEnterEvent is fired.

 void OnTriggerEnterEvent(Collider2D col)
 {
     if (col.tag == "Ladder")
     {
         // Get the ladder's position
         ladderPosition = ...
     }
 }

Later on then,

 if (IsClimbing)
 {
     // Lock onto the ladder's x-position.
     transform.position = new Vector3(ladderPosition.x, transform.position.y, transform.position.z);
     ...

Is there a simple, out-of-the-box approach to getting the position of a colliding tile? Note: col.transform.position will just return (0, 0, 0) because it is getting the position of the overall tile map. I am seeking the position of the particular tile in the map which my character is colliding with.

I'm also open to alternative suggestions, but keep in mind: I want the level-designing workflow to be as easy as possible because I am working on a game that will potentially have hundreds of levels.