A hidden oasis in the heart of Minneapolis is also an Important Bird Area.

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

Each year, one talented artist puts on a show sculpting twelve butter-based busts of dairy princesses.

An underappreciated sculpture garden just a few blocks from the capitol building.

This lab's maddening silence is good for business but bad for sanity.

This NASA test station is home to some of the world’s largest and most powerful space environment simulation facilities.

The city of Rockford, Illinois is symbolically protected by a quartet of fittingly stony sentinels.

Former hotel turned into haunted playground.

The oldest house in Galena, Illinois, now is a reminder of when this city was the world's lead mining capital.

The “American Gothic" artist's largest works hang in an Iowa State University library.

These lamps were created to expel sewer gases after an event known as The Great Stink.

A well-preserved network of cavernous tunnels have spent silent centuries removing Toronto's waste.

Head underground and take a tour of the city's working sewer system, and see the underground river Senne, which defined Brussels for centuries before being covered in the 19th century.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

It's gunky, it's gross, and it's been freed from the sewer and put on display.

This large torch on the Hove coastline helped Sir Francis Drake defend England from the Spanish fleet.

This truly palatial work of Communist-era architecture now sits crumbling on a Croatian beach.

Indents in the pavement are all that remain from a grisly death machine in Paris.

This old steel industry company town has a tradition of parking cars on the sidewalk so people can walk in the narrow streets.

The site of a 19th century "dream city" that almost rivaled Chicago before being swallowed by the Indiana sand dunes.

These constructed wetlands naturally filter millions of gallons of treated wastewater every day.

With nickel-steel armor and three-inch thick bullet resistant windows, FDR's train was a rolling fortress.

Where monkeys run wild and the humans are caged.

Found: Garden of Eden in Miami-Dade County, Florida.