The site of Paul Revere's historic two lantern warning.

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

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

A flooded Mexican cave that hides a river beneath the water.

A sprawling network of century-old subterranean catacombs lies beneath a nondescript suburban home.

One man's fulfilled dream of living on an artificial island made of recycled plastic bottles.

Cliffs that hold fossils, including the earliest known reptile, dating back more than 300 million years.

Twice a day, the water of the Petitcodiac River flows upstream in a surfable wave.

A complicated, forgotten beacon of hope for thousands of immigrants, "Canada's Emerald Isle" lies in ruin.

Stone monument honoring a town founder has a witch-boot shaped stain and a curse to go with it.

As communication goes completely wireless, this Maine museum remembers all the wires that got us to this point.

The highest point in Maine is a grand gift to the state citizens that also happens to be one end of the Appalachian Trail.

This nature mural exists to protect the surrounding environment and its own canvas from destruction.

This architectural onion has an original 1930's Jerry O'Mahony dining car at its core.

This huge 12-foot concrete moose on the coast of Nova Scotia is the grandest of the sculptor's giant creatures.

The profile of one ill-fated deacon was emblazoned forever on this church window during the Halifax explosion.

Go inside the house that inspired L. M. Montgomery to create one of literature's most beloved heroines.

The whole of Maine's history with the salty little fish is packed into this tiny coastal museum.

The city of Halifax still bears the scars of the largest explosion prior to the atomic bomb.

The final resting place of 121 victims of the RMS Titanic, 42 of which may never be identified.

An elderly widow still operates the incredibly detailed model railroad she and her husband built by hand.

Made from local Irish moss, this pie is served only in Prince Edward Island's potato museum.

The world's longest covered bridge is a quaint and incredible wooden tunnel.

This engineering marvel is the longest bridge in Canada and one of the longest spans in the world.