Final resting place of the two women killed on a small island off the coast of New Hampshire.

Once the future of underwater combat, this old sub is now open for visitors to muck around in.

These towering spires and glowing walls are carefully crafted from hundreds of thousands of icicles.

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

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

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.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Macabre astrological automaton clock dating to the late 1400s.

The current seat of the Parliament of Andalusia was once the epicenter of the Great Plague of Seville.

An eerie collection of the surviving structures from a past celebration of the future.

The world's largest wooden structure.

The final resting place of the great navigator, or maybe his brother.

America's oldest archaeological site or a muddled case of wishful thinking.

Stumps of an Ice Age forest, visible only at low tide.

Palatial mansion estate used in films including "Flowers in the Attic" and "The Witches of Eastwick."

This picturesque abandoned home is rumored to be a spite house.

A historic custom house with ties to George Washington is now a shrine to local nautical history.

This candy-striped tower is the farthest east you can go in the United States.

Maine's oldest diner also happens to win acclaim for its elevated comfort food.

Scene of the grisly murder of two Norwegian women in 1873.

A century after his death, this covered bridge still calls to mind the plein air painter who loved it.