A wunderkammer of gold and silver reliquaries and ancient saintly bones.

The complex has been abandoned since the Croatian War of Independence, barring a stint as a set for 'Game of Thrones.'

A curious cave church carved into the face of a cliff.

An impressive collection of farm equipment and other artifacts from life on the prairie.

A striking sculpture built to honor the women of the Lakota and Dakota Nations.

The remains of a failed subway in upstate New York is now an underground graffiti bunker.

A collection of the best toys ever made, The National Toy Hall of Fame is filled with kids, fun, and for some reason, a bird preserve.

The world's only statue dedicated to the greatest Great Dane in comic strip history.

This institution pays tribute to an associate justice who protected civil rights and prosecuted Nazis.

The first and only American institution dedicated to the enduring value of comedy in the United States.

Its original statue was deemed so ugly, locals called it “Scary Lucy.”

Where the oil industry began.

An elaborate memorial to a man local legend says died of a broken heart.

This former hub for crafty philosophers was founded by a writer who died aboard the infamous RMS Lusitania.

Buffalo's abandoned concrete grain elevators are getting a second life.

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

One of Frank Lloyd Wright's greatest—and favorite—architectural masterpieces was almost lost.

A beautifully designed asylum was resurrected as a hotel and art center with a ghost story or two.

A 19th-century architectural wonder designed by the "father of the skyscraper."

The seat of Buffalo government is a gorgeous Art Deco palace.

A European-style bath house in Chicago.

The palatial McDonald's that inspired Wesley Willis.

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

This titanic Catholic church in Chicago is also a refuge of the fictional cult-favorite wizard detective Harry Dresden.