The Greek Doric-style memorial sits on the western end of the National Mall and has been the setting of many famous speeches throughout its history.

Emotionally stirring memorial pays tribute to the men and women who served in one of America's most controversial wars.

Hillwood, the grand estate of Post Cereal heiress Marjorie Merriweather Post, sits on 25 acres overlooking Rock Creek Park in northwest Washington DC. Along with a world renowned collection of Russian and French decorative arts, Hillwood also features extensive gardens and special exhibitions.

This memorial to Korean War veterans consists of the Pool of Remembrance and the triangular Field of Service depicting 19 soldiers on the field of combat.

The Basilica of the National Shrine of the Immaculate Conception is the largest Roman Catholic church in the United States and North America, and is one of the ten largest churches in the world. The Basilica is the nation's preeminent Marian shrine, dedicated to the patroness of the United States; the Blessed Virgin Mary under her title of the Immaculate Conception. It is oftentimes affectionately referred to as America's Catholic Church. Visited by Pope Francis, Pope Benedict XVI, Saint John Paul II, and Saint Teresa of Calcutta, among others, the Basilica, though distinctly American, rivals the great sanctuaries of Europe and the world. Byzantine-Romanesque in style, its massive, one-of-a-kind superstructure is home to over 80 chapels and oratories that relate to the peoples, cultures and traditions that are the fabric of the Catholic faith and the mosaic of our great nation. The Basilica also houses the largest collection of contemporary ecclesiastical art on earth.

Consisting of 56 pillars that represent the U.S. states and territories, this impressive national monument honors all who served in the U.S. Armed Forces.

Open area of gardens, fountains, trees and monuments stretching nearly two miles between the Capitol and the Lincoln Memorial.

Though the Library of Congress doesn't own every book ever published, it sure has most of them, with 532 miles of shelves and 115 million items, with 7,000 added each working day.

The sixth-largest cathedral in the world, Washington National Cathedral is an architectural masterpiece, a national house of prayer for all people, and a gathering place for the nation in times of sorrow and in times of celebration. It has been the site of presidential funerals, inaugural prayer services, and many historic moments, including the final Sunday sermon delivered by the Rev. Dr. Martin Luther King, Jr.