Two stunning 17th-century libraries and a cabinet of curiosities.

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

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

Narrowest house in Boston.

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

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

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

A tombstone on the grounds of the royal castle marks the burial site of a Swedish king's beloved dog.

A king's bloodstained shirt is among the gruesome collection of artifacts displayed below Stockholm's Royal Palace.

It was meant to help transport wounded soldiers to a secret underground hospital.

This statue and park honor the Swedish chemist Jacob Berzelius, one of the founders of modern chemistry.

The world's largest underground iron ore mine.

A concrete Picasso in the middle of a student housing complex on the outskirts of Stockholm.

The lost American era of gunfighters, bandits, Indians and steam trains is recreated in Sweden.

This giant subway sculpture celebrates the fruit that inspired the theory of gravity.

A replica of the beloved character's house, modeled after the author's own drawings.

This gem from the industrial age helps visitors and residents alike traverse hilly Stockholm.

The remnants of a record-setting industrial bucket system can still be found dotting the Swedish countryside.

Not quite the cultural gateway between China and Sweden its designer imagined.

The official meeting point for the oddly named governing assembly of ancient Sweden.

His body was found mysteriously preserved in a Swedish mine over 40 years after his initial disappearance.

The Swedish flag over this small naval fort signals that the nation is at peace.

A catapult rock from Gotland’s 13th-century civil war is still lodged in Scandinavia's best-preserved medieval city wall.

A Gothic-inspired fish market is Gothenburg's best place to find loaves and fishes.