This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

Behind a bodega is a small museum of relics and ephemera showcasing the history of New York.

This painted marvel is San Francisco's 400-foot ode to urban biking.

A pair of mutilated bronze octopuses slump at the base of the monument honoring California's admission to the U.S.

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

The last masonry skyscraper ever built reveals a transitional moment in architectural history.

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

This surprising gem is a world-class archeological museum hidden at the University of Chicago.

Beloved bar home to musicians of all eras and reputations.

Chicago's North Park Village was once the largest municipal sanatorium in the country.

An enormous pair of straw sandals woven in the traditional way—to keep demons at bay.

The unusual patterns in this rock formation result from two distinct modes of weathering.

A spectacular remnant of an Adler and Sullivan masterpiece that was destroyed in 1972.

A source of civic pride, though the reason for its construction is unknown.

This nearly 200-year-old restaurant's history includes an exiled French prince, JFK, and a very hungry Daniel Webster.

Thomas Jefferson's estate is home to hundreds of varieties of historic fruits and vegetables.

This is the last hand-cranked chain ferry of its kind in operation in the United States.

See no evil, hear no evil, speak no evil.

An enormous roadside pan tells the story of a battle for pie glory.

One of the world's earliest skyscrapers.

Vice President Humphrey's final resting place is tucked away in this cemetery along with a few other notable figures.

Hidden on the seventh floor of a historic building, this Cajun spot features wall-to-wall bottles of hot sauce.

Over thousands of years, this slot canyon was carved out of the bed of an ancient lake.