In Chicago, a pizza-enthusiast has opened a museum dedicated to the history of pizza.

An overgrown garden stands as a grim marker of an unrealized dream.

Combination beer garden and music venue in the heart of Wicker Park.

This $3 million model train takes you through Chicago, Seattle, and the thousands of miles in between.

Former meatpacking facility turned vertical farm and sustainable business complex.

Internationally known record store and purveyor of "dusties."

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

This whimsical Oz-themed park had a wonderful impact on the surrounding neighborhood.

House of vintage taxidermy and Steampunk sculptures in a quiet Pittsburgh neighborhood.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

The world's only known button museum.

A monument to the art of slicing people open.

A military museum and library dedicated to the citizen soldier.

Chicago's largest cemetery is full of beautiful Victorian monuments and more than a few ghost stories.

A century-old hotspot for jazz, frequented by everyone from Charlie Chaplin to Al Capone.

A speakeasy takes on Chicago's drinking culture.

Fake rail crossings mark the site of an influential doctor's demise.

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

A gothic church spire sits atop this skyscraper, the tallest church in the world.

A perfect circle of twenty-four mysterious holes dates back to prehistoric time.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

The burial place of an obscure North African saint was turned into a macabre body preservation factory for the 17th-century Neapolitan elite.

St Bernard de Clairvaux Episcopal Church, better known as one of the oldest European buildings in the Western Hemisphere.

Former villa and estate of James Deering developed to preserve native tropical forests.