You will not believe this...

Remember that ending scene out of Indiana Jones where the Ark of the Covenant is boxed up and wheeled through an endless government warehouse? Tap to play or pause GIF Tap to play or pause GIF

Did you know that that place actually exists? It is called the Center of Military History.

It is located 30 minutes outside Washington, D.C., at Fort Belvoir in Virginia. The building itself is very nondescript...

...but behind a series of highly alarmed doors...

...and long, cement, camera-laden hallways...

...is the highly sophisticated, climate-controlled treasure room where the Army keeps its most precious artifacts. The facility was built for $24 million in 2010.

The cavernous warehouse is typically shrouded in total darkness. Motion lights illuminate only the areas in which someone is walking. Tap to play or pause GIF Tap to play or pause GIF

Behind these giant doors lie the Army's historic collection of weaponry.

The room consists of dozens of collapsable "hallways" filled with the richest American firearm collection on the planet.

The collection is stacked with priceless items. One-of-a-kind boat gun that pre-dates the Revolutionary War.

The entire collection can be moved at the press of a button... Tap to play or pause GIF Tap to play or pause GIF Tap to play or pause GIF Tap to play or pause GIF

...to create new endless hallways of historic firearms. Tap to play or pause GIF Tap to play or pause GIF Entire lineages of weapons are kept here for research as well as preservation purposes.

Another portion of the warehouse consists of endless rows of gigantic airtight lockers. This is called "3D storage." Every meaningful artifact that has been worn on a military battlefield is stored here. Including Gen. Ulysses Grant's Civil War cap.

Famous generals' uniforms and Revolutionary War powder satchels...

...flags, canteens, and cannons.

And the rows go on and on and on and on...

But the crown jewel of the collection is the 16,000 pieces of fine art the Army owns.

The art is kept on giant rolling metal frames. Tap to play or pause GIF Tap to play or pause GIF

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The massive collection consists of donated and commissioned pieces. Much of the art was painted by soldiers who experienced their subjects in real life. During World War I, the Army began commissioning artists to deploy into the war zone and paint the scenes they observed. This practice has continued to this day. Much of the museum's collection consists of these commissioned wartime pieces. The collection also keeps hold of valuable donated military art and historical pieces dating back to the Mexican American War.

The art tells the story of America's wars through a soldier's unique perspective.

Some works are just beautiful beyond words.

"Softball Game in Hyde Park" by Floyd Davis.

Every aspect of war is captured in the collection.

"That 2,000-Yard Stare" by Tom Lea.

The collection also includes original Army propaganda art.

Including beautiful Norman Rockwell originals that the Army commissioned in the 1940s.

Original Rockwells like these regularly fetch tens of millions of dollars at auction.

Virtually every American conflict is represented from a first-hand soldier's perspective. Vietnam.

Desert Storm.

Humanitarian aid missions to the conflicts of the 1980s.

Peace and war.

The "war on terror."

The soldier's perspective...

The collection also has a controversial side that has never been displayed. Unique art and artifacts that were seized from the Nazis after World War II are stored here. The painting above was filmed at the center for the 2006 documentary The Rape of Europa.

Including watercolors painted by Hitler himself. Tap to play or pause GIF Tap to play or pause GIF At the age of 18, Adolf Hitler applied to the Academy of Fine Arts in Vienna but was rejected. A number of Hitler's paintings were seized by the U.S. Army at the end of World War II and found a home at the center. None of the confiscated Nazi art has ever been displayed, and the curators thought them too controversial for this piece. The scene above was filmed at the center for the documentary The Rape of Europa.

Not a single piece in this massive collection is open to the public. Why is it kept under lock and key in a blackened warehouse?

Simple answer: Because there is no museum to house it. The entire collection could be made accessible to the public, if the funds for a museum could be raised.