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

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.

A shining sculpture made of 3,115 lights, the number of visible stars in the Northern Hemisphere.

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

Chicago's largest cemetery is full of beautiful Victorian monuments and more than a few ghost stories.

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

An enormous park-like oasis, full of famous Chicagoans' graves.

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

A lush green oasis in the middle of Chicago.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

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

America's smallest town is run by its single citizen/mayor/librarian/bartender.

This museum is dedicated to preserving Minnesota's lake culture through displays of vintage watercraft and rotating exhibits.

An abandoned fish-shaped drive-in gets a second life as a restaurant.

A Norwegian church that was built before Wisconsin was even a state has been entirely moved to a nicer spot.

A futuristic climate change study is nestled deep within this public land.

This Minnesota town celebrated the state's 100-year anniversary by creating a massive ode to nature's smartest bird.

The dishes at this restaurant by The Sioux Chef celebrate indigenous heritage.

A 115-year-old restored German dining hall awaits those who venture beneath the Minnesota State Capitol.

A spooky defunct railroad tunnel now part of a sprawling trail.

This replica of an 8th century burial ship actually sailed to Norway before returning home to Minnesota.

These curious caverns have been home to mushrooms, gangsters, and disco.

This large midwestern cavern features impressive rock formations and an underground waterfall.

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