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

This historic patch of real estate offers a glimpse of colonial Boston.

This nearly 200-year-old restaurant's history includes an exiled French prince, JFK, and a very hungry Daniel Webster.

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

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

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

This statue intended for children to enjoy became a minor political spat.

Dedicated to a colonial woman who was hanged for being a Quaker.

This bronze sculpture was inspired by a photograph of Martin Luther King Jr. and his wife embracing after he won the Nobel Peace Prize.

Created by a local artist, these quirky sculptures each have their own names and personalities.

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

The Boston square dedicated to the dark poet who was born nearby.

True to its name, this bouncy walkway may be the world’s smallest suspension bridge.

The grave of Mary Nasson is shrouded by witchy legends.

A precariously balanced rock perches on the edge of a cliff created tens of thousands of years ago by glacial erosion.

Birthplace of the "Cat in the Cradle" and a cluster of iconic, original windmills that let the Dutch tame the seas.

This may be the world's only drive-through windmill.

A large measuring stick marks the lowest point of a country that is partially under sea level.

A maze of crosses marks the jumbled divide between the Netherlands and Belgium.

A former customs station on the border of Germany and the Netherlands.

The tallest mountain in mainland Netherlands isn't actually very tall.

A beautiful maze marks where three countries meet.

This statue dedicated to the story of a Flemish boy and his dog was relatively obscure in Belgium, but a cult sensation in Japan.

Rare wooden escalators lead deep down into an otherwise staggeringly monotonous tiled tunnel.