The Go to Folder feature
The Finder has its Go to Folder feature, which can be used for accessing hidden directories, but similar to the Terminal, you can drag a file or folder here to reveal its full path.
To do this, open a new Finder window by pressing Command-N, and then press Shift-Command-G to reveal the Go to Folder panel for the new window. Then drag a target file from another window to the Go to Folder text field, where it will be converted to a full text path that you can select and copy. Unfortunately you cannot drag a file from the same window once the Go to Folder panel is open, but you can drag from the desktop or another Finder window.