A rare wayfinding portmanteau of “Street” and “Avenue.”

This collection of neon icons is preserving Arizona's history, one sign at a time.

In Tucson a giant metal snake helps pedestrians cross a busy highway.

This once-derelict building is now one of the most beautiful bookstores in the world.

A stark reminder of the huge nuclear weapons plant that once stood on the site and its effect on the surrounding area.

One of the few surviving Panama Canal steam shovels stands outside a tiny Colorado mining museum.

Antique automobiles, phonographs, organs, and farm equipment.

The clock that sets them all.

A research lab and hands-on museum where visitors can experiment with retro technology.

This tea house was a hand-built gift from Boulder's sister city in Tajikstan.

A girls' boarding school inspired by the Chicago World's Fair, once abandoned, now restored to strange and scenic glory.

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

A meow-velous tribute to a beloved street cat, made famous on the internet.

Iconic rock formations that allow for exploration during high or low tide.

These powerful, if squat, Canadian waterfalls flow in different directions depending on the time of day.

The Pennsylvania landscape depicted by a quarter mile of mosaics made from used road signs.

A tiny monument to the unsuccessful attempt by Thomas Jefferson to place the prime meridian in Washington.

This wall on a street corner in Lower Manhattan has been a blank canvas for a rotation of renowned artists since the 1980s.

Six beautiful wooden giants are hidden around Copenhagen.

One of the last Jazz Age "Wonder Theaters" in New York City.

The only home that Alexander Hamilton ever owned has a history almost as troubled as his own.

Visitors flock to see this church tower's unintended feature: It happens to resemble a giant chicken from multiple points of view.

A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

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