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

Millions of dollars worth of sculpture decorate this Iowa city center.

This once-grand marvel of engineering is now 41 miles of scenic hiking trail.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

Continuing the tradition of the dime museum in style.

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

Community bookshelf of 25-foot-tall book spines.

The history of the treatment of mental illness, illustrated in all its gory detail, and housed in an asylum.

An ornate Art Deco tile mosaic representing Nebraskan life, both modern and prehistoric.

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

The largest collection of historical roller skates in the world.

A brick-paved former section of the historic coast-to-coast highway.

An Iowa town celebrates its heritage with the tallest working Dutch windmill in North America.

An eclectic assortment of medieval architecture in a small Iowa town.

This zombie-themed restaurant stands out in the heart of corn country.

The world's only three-story rotary jail is now a museum to a bizarre trend in prison design.