A monument honoring those who died in the Great Famine of Ireland.

The absurd creation is a compulsory destination for selfies in Buffalo.

Chicago's museum dedicated to the history of bondage and fetishism is more textbook than titillation.

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

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

This whimsical Oz-themed park had a wonderful impact on the surrounding neighborhood.

The final resting place of up to 6,000 Confederate soldiers, the largest mass grave in the Western Hemisphere.

A strange and haunting monument of unknown origin in the historic Graceland Cemetery.

Home to a protest movement, a bombing, and a dramatic change in labor history.

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

Skulls from the plague of 1656 and World War II bombings are united by a cult dedicated to caring for the ancient dead.

The once forbidden "secret cabinet" of erotic art from excavations of Pompeii and Herculaneum.

The "Greatest Sewer" of ancient Rome is one of the oldest sewer systems in the world, and is still in use.

This ancient Roman prison is decorated with an upside-down cross not as blasphemy but as saintly tribute.

St. Francesca Romana, patron saint of drivers, resides in the church she founded.

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

At the crypt of St. Mary of Eulogies and the Dead you are left alone to ponder mortality among piles of skulls.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

Architectureal fantasy quarter of Rome.

This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.

Perhaps the most scandalous statue of America's first president.

The oldest continuously operating fish market in the United States.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

This lonely waterfront memorial to the men of the Titanic was erected by the "Women of America."