The massive, original Colgate Clock is mounted on a defunct factory building that was once a prison.

Once one of the largest producers of pig iron in the world.

This futuristic bridge is one of the longest self-anchored pedestrian bridges in the world.

This ancient settlement contains some of the largest earthen mounds in North America.

The highest rapid transit station in the world.

The longest continuous underwater road in North America was built at the insistence of Franklin Roosevelt.

A massive forgotten storehouse from 1913 on the Brooklyn Waterfront has a spectacular view of Brooklyn.

Two monstrous warehouses. One now holds priceless works of art, the other stands abandoned and dilapidated.

Once a popular watering hole among longshoremen and shipyard workers, this neighborhood treasure spans more than 100 years of Red Hook history.

The factory that helped produce a dominant form of lighting before Thomas Edison.

A strip of modern stores in historic buildings.

Compensation for the destruction of a historic shipyard.

The most unloved grain elevator in Brooklyn was a “Magnificent Mistake.”

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

This abstract sculpture is rumored to cast a hammer-and-sickle shadow once a year.

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

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

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

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.

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

Where old school Polish Chicago and young hipster Chicago live side by side.

One of the last functioning antique elevators in Chicago.

The beloved home to all publications indie, erotic, and punky.

A chance to follow in the footsteps of the word's most legendary animator.