Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

The premier place to experience the Victorian imagining of the steam-powered future.

The ruins of New Zealand's largest classical-style church.

An unusual and powerful memorial in which earthquake victims are remembered by empty white chairs.

New York's unstoppable progress turned this cemetery into the smallest burial ground in the city.

This Fifth Avenue church has long been the favored worshiping place of Broadway actors and vaudeville performers.

The most confusing clock in New York.

No one messes with the Massachusetts sacred cod, not this time...

This massive tea kettle was once a promotional stunt for the Oriental Teashop.

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

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

Millions of numbers carved in glass represent the tattoos forced upon victims.

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

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

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

The site of one of the strangest disasters in history—a wave of deadly molasses traveling at 35 mph.

"Mock all and sundry things, but leave the saints alone."

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

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

Friction between grains of sand cause a curious "singing" sound.

At the supposed instruction of Ben Franklin and Socrates, a Spiritualist believer intended to birth a mechanical messiah here.

Memorial of the Salem witchcraft hysteria in the town of Danvers, where it all began.

Ice cream stand, snack bar, and time capsule of milk conveyance.

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.