The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful geyser under environmental threat.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

An architect's childhood fantasy treehouse made real.

The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

One of the largest collections of wildlife art in the United States, built into the side of a cliff in rural Wyoming.

The 40-year-old machine serves soda quicker than you can catch it for a mere 75 cents a pop.

This robust fence in front of a historic Georgetown home is likely made from hundreds of recycled Revolutionary War firearms.

There’s a special club house at the top for the bell ringers.

Architecture lovers won’t stop touching the National Gallery's 19.5 degree marble prow.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

The discovery site of the "Capitalsaurus," the official dinosaur of Washington, D.C.

Washington's iconic carousel has a nice piece of Civil Rights history.

A fantastic array of trays and cables once whisked books over to the Capitol at 600 feet per minute.

The institution is sitting on a goldmine of 21,000 paints, varnishes, pigments, and primers preserved for posterity.

The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.

A much-maligned monument to teetotalism.

The monument's pointy aluminum tip has been melted down by repeated lightning strikes.

An overlooked oasis of quiet on the grounds of Washington's monumental basilica.

An easily overlooked memorial to a Ukrainian famine-genocide that killed over 4 million people.

A clone of a cloned tree that was so important it allegedly had its own guards.

In the basement of the U.S. Capitol Building is a hidden storage room full of ornate floor tiles leftover from the 1850s.

This lovely pocket park is one of the most under appreciated in D.C.