You can open the current terminal working directory and display it in the Finder using:
open . |
You might also be interested in knowing how to:
Open the current parent directory in Finder
open .. |
Open a specific directory in Finder
open dir1/dir2 |
Open a file with the default application
open file.txt |
Open multiple files:
open file1.txt file2.txt file3.txt |
Open a file while specifying the application
open -a preview pic1.jpg |