This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.

Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.

Disks are rolled out onto the south lawn to absorb the impact of Marine One's wheels like giant coffee coasters.

"Congress may voluntarily remain in session throughout the summer, in order that our Congressmen may be protected from the intolerable discomforts and dangers of the ordinary outdoor weather!”

Go take a picture with the inventor of the daguerreotype photographic process.

The privately owned cemetery that holds room for Washington's finest when they step down from life.

The world's oldest soul food restaurant is also one of its best.

This imposing Masonic temple a mile from the White House was the first public library in Washington, D.C.

One of the last active volcanoes on the Eastern seaboard.

The flower-shaped temple in Virginia aims to transcend the boundaries of the world’s religions.

This forgotten boat elevator was an engineering marvel in its heyday.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.