Information

Tourist Information in National Mall

Smithsonian Visitor Center

Located in the Castle, this center is a great resource; staff at its information desk can supply everything you ever wanted to know about the museum programs.
Tourist Information in National Mall

Washington Monument Kiosk

This is where you pick up tickets to go into the monument, though like the monument it's currently closed until spring 2019.
Tourist Information in National Mall

National WWII Memorial Kiosk

This information kiosk sits beside the memorial to the south and has a viewable registry of war veterans.