A half-size replica of the World Trade Center towers above Tulsa.

The collection is housed in an exquisite mansion that makes you feel like you've been transported to an Italian villa.

This abandoned, windowless concrete block is one of the strangest buildings in Tulsa.

Home with Gothic windows featured in a famous painting.

Eight feet in diameter and more than 24 feet around.

Millions of dollars worth of sculpture decorate this Iowa city center.

Piled high inside this warehouse and coffee shop are salvaged goods that span every corner of the globe.

A giant lumpy candle serves as a beacon for this highly scented pit stop.

Lions and tigers and leopards, servals, pumas, bobcats, lynxes, and ocelots... oh my!

Ornate limestone building now filled with geologic specimens, and more.

A flamboyantly decorated bridge signals diversity and fellowship at the entry to Indianapolis' Broad Ripple Village.

The largest historic preservation organization in the United States.

This multisensory alley has the ability to remind bustling citygoers to stop and smell the roses.

This stately clubhouse has showcased German-American culture for over a century.

The Beaux-Arts aquarium boasts a vast collection of saltwater and freshwater fish on an island in the Detroit River.

Advice-columnist's bell tower, paid for with pennies.

Controversial tribute to the heavyweight champion boxer who grew up in Detroit.

The concrete shell of an industry giant remains as a playground for graffiti artists, auto scrappers, and paintball warriors.

The world’s largest Masonic temple was saved by the White Stripes.

A Beaux-Arts triumph set to become Ford's innovation campus

Glass and concrete building designed by Albert Kahn.

Berry Gordy Jr.'s old home was the original headquarters of Motown Record Corporation.

A monument to the Mohawk people stands along an old Native American trade route.

Inspiring Herman Melville and Henry David Thoreau, Mount Greylock in western Massachusetts is the highest point in the state at 3,491 feet above sea level.