Turning night into day in Victorian-era Austin to thwart a serial killer.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

This experiment in the lifespan of seeds will take a century before it is complete.

At HopCat, a marker honors fictional creatures with the ability to travel the missing dimensions of Kcymaerxthaere.

Outside Grand Valley State University, you'll find a bench upon which many were said to have sat according to the fictional Kcymaerxthaere, waiting for a guide of time.

Outside Hope College in Holland, Michigan, a marker honors a University without people from the fictional Kcymaerxthaereal times.

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

This urban drawbridge gained eternal pop culture fame when the Blues Brothers jumped it while it was raised.

This midcentury chapel is a bold architectural statement and a symbol of Indiana's Lutheran heritage.

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

Known as the "Cross At The Crossroads," this massive metal cross is just short enough to avoid the FAA.

This botanical garden outside Chicago boasts an array of more than 300 varieties of lilacs.

Despite its name, this fast food museum is actually a replica of the ninth McDonald's store.

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

Urban explorers embraced America's now demolished first suburban mall, south of Chicago.

Half-sized replica of the Leaning Tower of Pisa built to honor Galileo.

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

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

This elaborate Hindu temple is located in a Chicago suburb, but looks like it was transported directly from India.

The final resting place of the world's first nuclear reactor.

What was once one of the country's largest confectionary plants is now an abandoned ruin, but is still pretty sweet.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

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

This life-size bronze statue remembers the tallest recorded human in his Illinois hometown.