A controversial memorial at the place where Captain Cook met his violent end.

Watch the newest land on the planet form before your eyes.

Sacks of potatoes, made of cast stone, mark where the iconic potato sheds once stood along the river.

This robust fence in front of a historic Georgetown home is likely made from hundreds of recycled Revolutionary War firearms.

A coastal rock outcrop with mysterious inscriptions variously attributed to Native Americans, Portuguese, Phoenicians, Norse, and more.

It took 275 years and four burials to finally put the Mayflower’s most famous passenger to rest.

The Atlantis of Cape Cod reemerges during the lowest of tides.

The Cape Cod house that whaling built.

This memorial honors those who served on Gallops Island Radio Training Station during the second World War.

A real plaque marks the spot where a Faulknerian character committed fictional suicide.

A plaque memorializes the Boston location of one of the largest nightclub fires in history.

Statue commemorating the use of ether in anesthesia.

One of the now-less-hidden floral gems of the "Emerald Necklace."

The bears may be gone, but their old cages can still be found.

The often-overlooked ruins of one of the first buildings designed by famous landscape architect Frederick Olmsted.

The history of the tea trade is told in bas-relief on this historic pair of Boston doors.

Painstakingly built dioramas sit unnoticed in a Boston office building.

Beautiful steampunk ghosts of early Massachusetts.

A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.

A former copper mine which became a truly unsuccessful prison.

A reliquary of pop culture marvels, including the world's largest (and most terrifying) Jack-in-the-Box.

The former home of Samuel Clemens and family remembers the happiest period of the author's life.

The ancient past meets the retro-future at these dinosaur tracks that are protected by a geodesic dome.

Memorial to one of the most fatal fires in both circus and U.S. history.