Aside from the White House, the United States Capitol building is the most visited building in Washington. This incredible building with its regal dome and classic architecture symbolizes democracy to everyone who sees it. The view from the front steps is like nothing else, so make sure you have your camera with you. Tours are available at the kiosk on the southwest side of the Capitol, and are free of charge, on a first-come, first-served basis. Plan to get there early, as there are always plenty of people in line for this extremely popular attraction.
The Washington and Old Dominion Trail (W&OD or "Wad") is an excellent recreation trail that runs through the Northern Virginia counties. The 45-mile trail is completely paved with nine foot wide asphalt and has a yellow painted center line. To run the whole trail and back means you're looking at a 90-mile trek, but it can be done over the course of two days thanks to the hotels and bed and breakfasts along the trail. The only real complaint from bikers is that there's much traffic most of the time due to the Wad's immense popularity.
C & O Canal Boat Rides offers outdoor enthusiasts a chance to get closer to nature while learning some interesting history about the Chesapeake and Ohio Canal. It begins as a history lesson in the 1870s when these waterways were used for trade, and that era is highlighted as you pass several historic buildings as the tour progresses. Beautiful foliage and even some trails can be seen from the boat, as the 1 hour canal boat ride is both an historic and visually appealing experience sure to delight visitors who are out to learn as much as they can about this area of the country.
The two of you deserve to put some artistic flair into your romantic time together, and there's no better place to do that than the John F. Kennedy Center for the Performing Arts. America's memorial to President Kennedy keeps an artistic tradition alive that would have put a smile on the face of the beloved fallen leader. There are 7 different theaters in the venue that are always featuring such works as ballet, dance, opera, symphonic presentations and so much more. There are enough places on the grounds for the two of you to sit and enjoy each other's company before or after whatever production you have decided to take in.