This tall and trim architectural oddity is one of the skinniest buildings in San Francisco.

A museum dedicated exclusively to the lore and history of ouija boards.

A simple but powerful tribute to the 20 victims of the 1692 witch trials.

A rare 16-bedroom Qing Dynasty house re-erected on the campus of the Peabody Essex Museum. 

This bridge was the birthplace of a unit of measurement based on a fraternity joke.

This location holds the truth to what truly happened that faithful night.

Montmartre's sole surviving windmill became an iconic landmark for 19th-century painters, artists, and bohemians.

The celebrated eyesore created by starry-eyed sweethearts.

The oldest continuously operating mint in the world that has been making coins since the 9th-century.

If you look closely at the oldest bridge in Paris, you might notice hundreds of ugly faces leering from its sides.

This demon atop the Notre-Dame de Paris looks utterly bored.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

Located in Faneuil Hall, the headquarters of the Ancient and Honorable Artillery Company of Massachusetts has stood the test of time.

The colonial home of Paul Revere during the American Revolution.

Silverware in the sidewalk outside a grocery store cements this neighborhood’s Italian culinary history.

This steep slide at a kids’ playground went viral after an police officer tumbled down it.

This historic hotel was once home to Henry David Thoreau and rumored to be haunted by ghosts of fallen soldiers from the American Revolution.

These structures serve as a memorial to one of Boston’s most ambitious and controversial urban redevelopment projects.

The only example of a Paris Métro sign in use at a subway station outside of the French capital. 

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

This sculpture was made out of recycled guns that were turned in to the city.

Wander down a side street dedicated to one of the members of the Beat Generation.

This colorful boulder serves as a canvas for political statements and artistic expression.

Around the perimeter of San Francisco’s second-largest park is a meandering 2.7-mile path designed to inspire contemplation.