This secret gem of a toy store houses a rideable carousel populated with fantasy animals.

At this Minnesota state park you can easily wade across the source of the mighty Mississippi.

An eatery within the Minneapolis American Indian Center writes colonial ingredients out of the story of Native American cuisine.

An architecturally-focused antique shop.

This large midwestern cavern features impressive rock formations and an underground waterfall.

The famed architect designed this Minnesota gas station of the future with a lookout tower.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

The basement bowling alley of this St. Paul dive bar is decorated with thousands of dollar bills.

A kaleidoscopic warehouse-maze of handmade neon signs.

Grant Wood painted some of his most famous works of art at this studio.

Home with Gothic windows featured in a famous painting.

A four story, football field-sized, nine-grotto creation made of shells, minerals, and rare stones.

A half-mile long and three stories high, this bridge over the Des Moines River Valley mimics a descent into a mine shaft.

A giant pair of thick black glasses mark the tragic demise of a trio of rock and roll legends.

Three-story slide through the New Museum.

The factory for the popular Dumbo location, the Greenpoint shop is a quiet gem.

The best way to get a sneak peek at the movies.

The ballpark in "Pigtown" where the Brooklyn Dodgers made their name was replaced with a huge apartment complex.

Depression-era fun lives on in this Harlem museum dedicated to the sport of the street.

A crumbling staircase in upper Manhattan is all that remains of one of the most important sites in sports history.

The iconic Manhattan corner that was once the site of the Beastie Boys' fake clothing store.

Those belting out show tunes might not realize this piano bar marks the site where Thomas Paine died in 1809.

A Jewish deli run by Yemeni Muslims in an Afro-Caribbean neighborhood is quintessential Brooklyn.

This subterranean oyster house has been the pearl of Grand Central Station since 1913.