Affectionately known as "Lord Bot," this historic statue has a cult social media following and rightly claims to be “the most metal inhabitant of the Wren Yard.”

Bubbling up from deep underground is the warm crystal clear water that fills the Warm Springs Pools, America's oldest spa.

The tomb was guarded by soldiers from both sides of the war, and some left their initials carved in the brick.

This colonial tavern played host to George Washington, Thomas Jefferson, and other famous early Americans.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

The graveyard holding the remains of George Washington's slaves was forgotten for nearly 200 years.

The Kirkland Monument remembers a selfless Civil War hero who braved the battlefield to give water to his dying enemies.

The romance of early commercial flight still fills this Art Deco destination.

A former major munitions plant that has been converted into a sprawling art space.

Soldiers were buried next to Lee's house in the center of Arlington Cemetery to dissuade the general from reclaiming his property after the war.

This stately building in Alexandria, Virginia was built by Freemasons to honor one of their most famous members.

Collecting 700 years of mechanical death-dealing, the NRA's sprawling gun museum is a revealing testament to the American obsession with armament.

America's first federal monument.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

This pre-Revolutionary War grist mill ground corn and flour for soldiers in seven American wars.

At 207 feet, one of the world's longest continuous escalators.

The resting place of a Civil War celebrity's amputated limb.

When you visit his grave, be sure to rub the Great Emancipator's nose for good luck.

The quintessential Japanese rock garden has existed for more than 500 years.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

Go inside to really appreciate this 500-year-old technological masterpiece.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.