The remnants of a Gilded Age elegance preserved in the middle of a stark modern tower.

This massive tea kettle was once a promotional stunt for the Oriental Teashop.

This mosaic commemorates the oldest subway tunnel and station in the United States.

This historic sculpture from the 16th century is even older than the city of Boston.

A giant sculpture head with an optical illusion dedicated to the longtime conductor of the Boston Pops.

This bridge was the birthplace of a unit of measurement based on a fraternity joke.

In 1958, an MIT fraternity pledge laid down on this bridge and instituted a new, unique unit of measurement.

A three-piece musical sculpture installed between the subway tracks at Kendall Station near MIT.

Dozens of bronze glove sculptures symbolizing loss and life decorate a busy Cambridge subway station

Earliest version of the American flag can be seen atop the hill where it first flew.

This tower commemorates the spot where George Washington hoisted the Grand Union flag.

A small plaque promises cold, hard cash in exchange for work by the famous pop artist.

This imperial marble stele was given to Harvard by Chinese alumni in the 1930s.

A perfectly crafted Pre-Columbian artifact dating back to 600 CE.

This massive World War II calculator hearkens back to the days when "computer" was a job title.

The thousands of shades on display — some toxic, others impossibly rare — are a library of more than just color.

One of the largest crucifixes in the world stands 55 feet tall in a secluded, wooded area of northern Michigan.

A small mountain made entirely of banded iron stone overlooking downtown Ishpeming.

As its grandiose name implies, this wooden dome is unsurpassed in size.

This 19th-century ghost town offers a stunning view of Lake Michigan and a journey through the region's industrial past.

This freshwater spring fills with 10,000 gallons of water per minute.

This lone tree and dramatic sandstone outcropping are so beloved by Michiganders they can be found on one of the state’s coins.

Two dozen rescued bears roam (mostly) free at the largest bear ranch in the U.S.

These dramatic cola-colored falls have appeared in a poem by Henry Wadsworth Longfellow and a song by Sufjan Stevens.