Site of a famous 19th-century transcendentalist utopian community, now abandoned.

The often-overlooked ruins of one of the first buildings designed by famous landscape architect Frederick Olmsted.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

Ralph Waldo Emerson spent two years living here decades before it became a Frederick Law Olmsted-designed park.

The Boston square dedicated to the dark poet who was born nearby.

A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.

Two thousand artifacts from around the world collected by one woman who loved to travel.

A beautiful Victorian-era cemetery, complete with a miniature village.

This Boston medical museum features the skull of the famous medical case of Phineas Gage.

Once known as the Illinois Asylum for the Incurable Insane.

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

This historic house museum that celebrates one of the world's most influential social reformers is also one of the most haunted locations in Chicago.

Where a brain, a beauty, a jock, a rebel, and a recluse met one Saturday and changed their lives forever.

People escaping slavery passed through the oldest house in Lombard, Illinois on their northbound journey to freedom.

A collection of 11 million buttons illustrates the human toll of the Holocaust.

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 cemetery is all that remains of a school for "wayward" girls.

This modest post office sits on the site of H.H. Holmes' famous murder castle.

Cemetery featuring rare glass-fronted columbarium.

This alley in downtown Chicago held the bodies of over 600 people after the fateful Iroquois Theatre fire.

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

Lovingly nick-named the "Brick Dick" this municipal tower was winner of the World's Most Phallic Building Contest.

This shallow cave got its name from copious amount of human bones found inside.

This freshwater spring fills with 10,000 gallons of water per minute.