A century-old network of freight tunnels underneath the city's historic business district.

Once at the center of U.S. finance, the historic Trading Room was meticulously recreated piece by piece and rebuilt in the Art Institute.

Not to be confused with the iconic New York City skyscraper, this Chicago building is a vibrant hub for artists.

Built to house a chapter of the Knights Templar, this grandiose building is a relic of Freemasonry in Chicago a century ago.

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

Pizza with a side of fine art.

Chicago's museum dedicated to the history of bondage and fetishism is more textbook than titillation.

An enormous park-like oasis, full of famous Chicagoans' graves.

An antiquated German apothecary on Chicago's North Side.

A Bibliophile's Dream.

A speakeasy takes on Chicago's drinking culture.

A giant bronze coil of feces is both a tribute to doggie defecation and a reminder to pick it up.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

A curious collection of miniatures in a quiet corner of the Chicago Children's Museum.

This ruined quarry once produced the distinctive red sandstone used for construction projects in Washington, D.C.

A remarkable time capsule of American manufacturing deep in Maryland coal country.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

Walk a trail through a historic Quaker town that outlawed slavery in 1777 and was a major waypoint on the Underground Railroad.

The ruins of this long-abandoned unsuccessful gold mine can still be found.

A girls' boarding school inspired by the Chicago World's Fair, once abandoned, now restored to strange and scenic glory.

An intricately designed junk art house with four extravagant junk art cars hidden in the suburbs.

This beloved Baltimore spot features caged dolls, a giant Pez collection, and many, many mannequins.

A hidden alley in urban Baltimore is a haven for graffiti artists.

The shelves in the back of this thrift store are devoted to saving, not selling, retro tech.