1. National Mall | Washington, D.C.
What is it? Immaculately maintained by the National Park Service, the National Mall and Memorial Parks feature more than 1,000 acres of must-see monuments, sites, and green space. While the Washington Monument towers above all else—quite literally, the city doesn’t zone for buildings taller than the marble icon—the Lincoln Memorial, Thomas Jefferson Memorial, Vietnam War Memorial and Martin Luther King Jr. Memorial are just as magnificent.
Why go? It will take a full day (or two) to see the National Mall—not only can you take in the grandeur and history on display at the monuments, it also gives you easy access to check out some of Washington, D.C.’s top museums.