Next to the Leaning Tower of Pisa is a cemetery home to ancient sarcophagi and disturbing murals.

The only visible reminders of an elaborate engineering project that kept the tower from reaching the tipping point.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

An enormous goose sits atop this nest-shaped home.

Unique tower has outlasted a takeover of the company.

Visitors to this arboretum are greeted by three smiling giants crafted from sustainable materials.

This modern castle sat empty for decades before a fire inspired its builders to complete its luxury halls.

A local scoured more than 1,000 acres for stone to create his masterpiece.

Once one of the most polluted caves in America, now an environmental success story and a museum dedicated to caves.

One of the few surviving "Wigwam"-themed motels.

The world's longest known cave system.

A pharmacy built in the shape of a mortar and pestle, now resembles a fancy cocktail.