A visit to Mount Vernon is a MUST, especially if you are in DC in Spring or Fall. Take a stroll around the property. It is a romantic atmosphere, but can also be used as a historical stop for you and your family. I recommend getting a timed ticket to see the house or the wait can be long. Also, if you live in DC and you think you will go on more than one visit to the estate in a year (especially if you have a lot of visitors), I recommend getting the annual pass. Finally, make sure to check the calendar to see if there are any fun events.