This is a great, and relatively quick, tourist stop where you can see the Constitution, Declaration of Independence, and Bill of Rights.
We love the Capitol grounds! We walk our dogs, Obi and Leela, through the park areas on the east side of the building, ride our bikes past the building on the way to and from each DC United match (where we first met!), and eventually got engaged here! It's one of our favorite places to see, day or night, and we highly recommend seeing it lit up at night if you can.
This is one of Nikhil's favorite spots in the Arboretum. We have a nice little bonsai collection ourselves and love perusing this museum for inspiration; some of the plants here are nearly one hundred years old!