A chilling disappearance (and rescue) of a child uncovers a geological mystery.

A science teacher's dream.

Illegal drag racing two stories beneath Chicago’s streets.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

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

To find the "unicorns of the deep" you've got to go downstairs.

These pretty kitties killed and ate as many as 135 railway workers.

A replica viking ship from the Chicago World's Fair is still in dry dock in an Illinois park.

World's second largest particle accelerator, where nature reveals its secrets.

Arguably the best example of an authentic Dutch windmill in the United States, rivaling its counterparts in the Netherlands.

The original vault that held the president's remains still stands, empty, not far from where he was finally buried.

When you visit his grave, be sure to rub the Great Emancipator's nose for good luck.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

Thousands of well-dressed mummies below a monastery.