A tiny, unmarked beer and whiskey bar above an Ethiopian restaurant in West Philly fails to conceal live bluegrass.

Obscure Freemasons still live in D.C.’s largest private residence.

The only Leonardo Da Vinci painting in the Western Hemisphere.

Press 1 for knock-knock jokes.

For 60 years, the academy had no permanent location until members voted Washington D.C. as its forever home.

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

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

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

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

A tiny piece of the Moon is embedded in this stained glass masterpiece.

A historic neighborhood church is reborn as a psychedelic arts collective.

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

South Philadelphia is home to Keith Haring's only surviving in situ collaborative public mural.

The taxidermied remains of Charles Dickens' pet raven, which helped inspire one of Edgar Allan Poe's most famous poems.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

This Manhattan museum houses one of the largest collections of Spanish art and manuscripts outside of Spain.

Walking around West Harlem reveals a scavenger hunt of beautiful bird murals.

You must take the A train... to the last active cemetery in Manhattan.

Feast on some of the finest momos in all of Queens.

A former Tibetan monk made a name for himself selling some of the best beef momos in New York.

Once thought to be the fabled Holy Grail, it is now known to be an oil lamp.

Three stories above you, your salad is being grown.

A mysterious statue of a leather jacket-clad rebel leans coolly on an odd yellow clock.

Love is in the air along the small street in Brooklyn.