A mysterious stone embedded at the base of a historic Boston building.

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

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

The vaulted ceiling is home to a scurry of “squirrelgoyles.”

Every year, the colorful murals of Montreal get a complete makeover.

This public art pays homage to the baseball legend and civil rights icon and his time in Montreal.

A fragment of one of history’s most famous walls stands as a reminder of unity in a culturally divided city.

A 20-foot statue reminds viewers of an extinct species.

A massive Montreal stadium that has seen nothing but trouble since its inception.

The biggest museum dedicated to insects in North America, one of the largest in the world.

This 1967 experiment in modular architecture was designed to be a new model for urban living.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

The skyline of Montreal includes the silhouette of an unexpected fruit-shaped Canadian staple.

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

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Seattle's super-sized cowboy apparel once belonged to a themed gas station that wrangled in herds of tourists.

An allegedly haunted mansion with a tragic, tawdry past.

A beautiful final resting place for some of the noteworthy deceased.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

A museum dedicated to "science, history and the arts" little changed since 1915.

From horses to stainless-steel trucks, this iconic Providence burger wagon is one of the oldest mobile diners in the country.