Home to items never before seen by the public.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

Long-abandoned trolley tunnels just a mile away from the White House are turning into an art space.

Legend has it the commander of the defenders drew a fateful line in the dirt with his sword just before the final battle.

Just like the real 36th president of the United States, animatronic LBJ amuses visitors with jokes and stories.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

A museum dedicated to exhibiting remarkable outsider art.

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

A marvel of Byzantine engineering under the streets of Istanbul.

The United States Capitol's former columns still stand.

Art deco landmark on the outskirts of Washington, D.C.

There just so happens to be a court even higher than the U.S Supreme Court: a basketball court in the building itself.