Over 100 towers were built in Bologna during the Middle Ages, but only 22 survive.

Pilgrimage site for star-crossed lovers.

Built to repay the sins of the father, this church is home to one of the most valuable works of Western art.

The incorrupt tongue of the patron saint of lost things is venerated in this basilica.

A toweringly silly piece of modern art has been delighting locals since the 1980s.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

Touching mementoes from those who didn't make it back from World War I still hang in one of New York's oldest bars.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

Once the tallest building in the world and the site of “the highest dinner ever held in New York” this building now holds the most expensive penthouse in the city.

The world's largest piece of copyrighted artwork.

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

This impressive Boston holy house is the American mecca for Christian scientists.

Historic Hull Street was actually the first street with a proper name in the Boston area.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

An easy-to-miss garden in Boston's North End honors the mother of JFK and others who lost children in WWII.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

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

The oldest Italian café in Boston, this spot also serves as a veritable museum of vintage coffee ephemera.

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

An enormous, inside-out glass globe built in 1935.

Bits and pieces from the ill-fated Donner Party's winter cabins.

One of the most elaborate displays of Jellyfish is on display at the aquarium.