Robert Frost could have used a local guide when he decided to take the road less traveled, as he discovered only too late that it was patrolled by feral park rangers. Learn how a tour guide makes all the difference with today's Groupon to Martz Gold Line/Gray Line in Washington DC. Choose from the following options:

• For $9, you get a child’s ticket for children aged 3–11 to the three-hour DC After Dark tour (a $19 value).
• For $19, you get an adult ticket to the three-hour DC After Dark tour (a $39 value).
• For $12, you get a child’s ticket for children aged 3–11 to the nine-hour DC in a Day tour (a $25 value).
• For $22, you get an adult ticket to the nine-hour DC in a Day tour (a $45 value).

Martz Gold Line/Gray Line houses intrepid explorers in its climate-controlled coaches for entertaining and informative romps through the nation’s capital. Led by licensed guides stocked with an encyclopedic knowledge of US presidents and their favorite bedtime stories, the DC in a Day tour whisks guests from the Capitol Building to the United States Botanical Gardens, stopping frequently to meander through various museums, archives, and memorials. A quick jaunt around the White House Visitor Center and a photo op on the White House lawn allow visitors to briefly live out childhood dreams of one day growing organic tomatoes in the White House garden. A pass by the J. Edgar Hoover Building gives visitors enough time to be legally detained under the provisions of the Fourth Amendment.

Alternatively, visitors can witness the majesty of patriotic lighting with the DC After Dark Tour, a three-hour sojourn around the historic city with stops in various memorials such as the Lincoln Memorial, Vietnam Veterans Memorial, and Jefferson Memorial. Along the way, tour-takers can bask in the illuminated views of national landmarks including the dome of the Capitol, the Library of Congress, Federal Triangle, the White House, the Capitol Reflecting Pool, and the capitol letter Q.