The oldest operating apothecary in the US has treated everyone from Thomas Edison to Mark Twain.

The "Seinfeld" diner.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

Ride the subways of yesteryear.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

New York City's smallest piece of private property.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

A semi-scholarly approach to sex.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

Elevated freight railway turned wildly successful urban park.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

A terrific purveyor of natural history objects and curios.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

This opulent Pueblo Deco movie palace melds Art Deco and Native American motifs.

The fictional star of "Breaking Bad" is memorialized with a real-life gravestone in his hometown.

Three hundred years of preserved Spanish colonial history in San Antonio.

These boots are made for selfies.

A gorgeous garden oasis with winding paths, stone bridges, and a troubling history.

A 2,500-pound wooden nickel makes this woodworking museum easy to spot from the road.

The 40-foot-tall votive candle is the largest of its kind.

A 131-year-old wunderkammer of Texas history.