The sign to a demolished amusement park now stands in front of a local library.

A free, public museum dedicated to the fascinating science of sight.

America's oldest Italian restaurant is a San Francisco institution.

This bridge over D.C.'s Rock Creek Park is sometimes called the "Buffalo Bridge" because of its four buffalo sculptures, which were cast from a single piece of bronze.

The legacy of a wealthy executive and his wife, this little-known art museum features works by Picasso, Monet, Renoir, Cezanne, and more.

The National Park Service’s best-kept secret with views that rival any in D.C.

The final resting place of an unidentified revolutionary soldier sits behind a Virginia church.

One of few surviving standpipe water towers in the U.S.

A commemoration of over 150 of St. Louis's favorite sons and daughters.

The eccentric and colorful pavilions of Tower Grove park are a beloved and overlooked symbol. 

A home designed to be on the cutting edge of comfortable, low-cost living.

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

This haunted hotel built on natural springs once served as a hospital for a quack doctor promising a cure for cancer.

An extravagant western hotel where every floor is the "ground floor."

There has been an astronomical clock on this spot since the 14th century.

This artistic fountain display pays homage to this area's theatrical history.

San Francisco's oldest surviving monument and meeting place for 1906 survivors.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

The second building of its name to occupy this location might be the finest flatiron building in San Francisco.

Early prototype for Frank Lloyd Wright's Guggenheim.

A library built during San Francisco's pioneer times is a student's retreat, bibliophile's sanctuary, and chess player's delight.

These chunky stone towers out in Lake Michigan are the key to Chicago’s drinking water.

A 400-foot-tall tall map of Chicago makes this once-ignored building stand out.

This landmark of the Chicago silent film industry may not be in the picture business anymore but it still stands proudly.