Underneath downtown Lincoln resides a network of caves that was also the city's first brewery.

A stark reminder of the huge nuclear weapons plant that once stood on the site and its effect on the surrounding area.

An impressive collection of over 50,000 minerals including moon rock from the Apollo 17 mission.

This iconic science fiction house still looks like something from the future.

The final resting place of American icon Buffalo Bill, and a museum that aids in telling his tale.

These experimental weapons brought World War II to Nebraska as well as 26 other U.S. states.

An idle pastime becomes a record holder in Boys Town, Nebraska.

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

The oldest house in Chicago certainly doesn't look the part and there are some who say it doesn't deserve its title either.

This unauthorized stone mermaid was secretly carved out of public stone before being permanently preserved.

A Chicago Movie Palace Lost to Time.

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

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

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

What's left of the ruins of the 1893 Columbian Exhibition, or World's Fair, also known as the White City.

The world's only known button museum.

One-of-a-kind preserved ruins of an abandoned 1880s church in Chicago's Pilsen neighborhood.

This surprising gem is a world-class archeological museum hidden at the University of Chicago.

One of the largest pieces of scientific equipment ever carried on a NASA space shuttle sits in a Chicago alley.

The face of a woman pushes its way through the earth.

A hollow cement depiction of time's inexorable effect on the human body.

The original Garfield station is the oldest station facility on the "L", with the station house dating from 1892.

The final resting place of up to 6,000 Confederate soldiers, the largest mass grave in the Western Hemisphere.

This cheerfully-named branch of the Chicago River is the fetid result of years of blood, entrails, and meatpacking waste.