The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

Enormous lake at the bottom of a unique cave system.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

Sip creative cocktails in the former vault of the Riggs Bank.

Mysterious installations bring levity and light to a sometimes stodgy city.

Atop this media building, two hives containing more than 30,000 bees keep the surrounding area vibrant.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

A much-maligned monument to teetotalism.

Legend has it that President Grant’s frequent drinking in the lobby gave rise to the term “lobbyist.”

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

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

Sit where JFK proposed to Jackie or where Nixon dined on meatloaf at this storied pub.

Rumor has it the uncarved lump behind the three famous suffragists is reserved for the first woman president.

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

Home to a vast and influential collection of Shakespeareana.

The oldest continuously operating fish market in the United States.

When it opened during the final years of the embargo, all the drinks and cigars were free.

This lonely waterfront memorial to the men of the Titanic was erected by the "Women of America."

A museum cafe showcases Native American dishes and indigenous ingredients from across the Western Hemisphere.

A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

This grand gothic brewery has been pumping out suds for over a hundred years.

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.