Inside this library, the history of Los Angeles is retold through a mural.

Built for an exposition in 1915, these horticultural displays have stood the test of time.

This bronze statue commemorates the strange and beloved mascot of UC Irvine—the only university to be represented by a giant anteater.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

A take-out restaurant that only serves cuisine from countries with which the United States is in conflict.

This shrine dedicated to the Virgin Mary is also a tribute from a mother to her fallen son.

This plaque marks a place where one of Hollywood’s most famous dancers got his start.

The last remnants of Fort Pitt also hold the distinction of being the oldest structure west of the Allegheny Mountains.

Sections of the iconic limestone columns have been left uncleaned as a reminder of the city's polluted past.

Once the most painted on object in the world, this short campus fence is well on its way to being so again.

A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.

The last street in Pittsburgh that's paved with wood.

An 18th-century Catholic church converted into an eccentric temple of music and bacchanalia.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

The residents of the Neighborhood of Make-Believe live without much fanfare within the Pittsburgh Children's Museum.

There aren't too many operational funiculars around, but Pittsburgh has two!

A quiet, gothic haven nestled between Pittsburgh's Squirrel Hill and Point Breeze neighborhoods.

One of the steepest streets in the United States makes an intriguing challenge for cyclists.

A restored Pittsburgh house of God has been converted to a marvelous house of suds.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

This colorful gate stands as an entrance to the walled city of Old San Juan.

This small city where almost everyone lives in the same building can only be reached via North America's longest tunnel.

Running under an entire mountain, the longest highway tunnel in North America is kept fresh using portal fans and jet fans.