18. Washington D.C.
Being the very capital of the entire nation, Washington D.C. is rife with American history. There are a plethora of monuments, museums, and plazas. Each provides you with stories of America’s rise as a country. You can stroll past the White House or the Capitol if you want to take any interesting pictures, as well as the Lincoln Memorial and the Washington Monument (via Oyster). One of the most popular times to visit Washington D.C. is in the spring when all of the cherry blossom trees are in bloom (via Oyster).