"X" marks the spot of an echo chamber in the middle of a plaza.

A museum devoted to the victims and the survivors of the most catastrophic fire in American history.

Homemade outdoor church and sculpture garden decorated with glass shards.

The arboretum whose marshy soil sucked up the dreams of housing developers.

This weird abode has inspired everything from the "House On Haunted Hil" to a robot hunter's pad.

Hidden away in the city of Madison, Wisconsin is a nearly forgotten home that Frank Lloyd Wright built for a childhood friend.

The house that Frank Lloyd Wright "(shook) out of his sleeve at will" at the age of 86.

This unique crypt designed by Frank Lloyd Wright for his longtime friend was not completed in either man's lifetime.

Despite repeated attempts to make it work, this former mining town is now nothing but dust and memories.

Topeka has its own great wall, and it's covered in colorful images from the city's history.

This Italianate Villa-style castle is pretty to look at, just keep off the private property.

The world's largest man-made underground caverns offer unparalleled underwater wonders.

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.

Dr Barnes' $25 billion private collection of art and arboretum.

The Mysterious Witch Bonney, a haunted statue in an old industrial city.

A crumbling stone stable and carriage house are all that remain of a manse that was once filled with Egyptian artifacts.

Books bound in human skin and H. P. Lovecraft's letters are among a few of the treasures this library has to offer.

The final resting place of New England's last "vampire."

This historic patch of real estate offers a glimpse of colonial Boston.

The headquarters of one of the world’s longest-running humor magazines bears a noticeable resemblance to a head wearing a Prussian helmet.

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

In 1958, an MIT fraternity pledge laid down on this bridge and instituted a new, unique unit of measurement.

This funeral home had the honor, if that is the correct word, of hosting the funeral of the famous Sacco and Vanzetti.

The site where Charles Dickens gave his first public reading of "A Christmas Carol" in the US.