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

What was once a true peninsula has now been filled in, causing the water to recede and leaving many streetside "waterfronts" and landlocked "islands."

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

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

"the sweltering inhabitants of Charleston and New Orleans, of Madras and Bombay and Calcutta, drink at my well . . . The pure Walden water is mingled with the sacred water of the Ganges."

Trash escaped from a landfill to fill beaches with all kinds of treasure.

Hill-like structures formed by glaciers and sandy spits of land.

MIT students continue the legacy of beloved professor "Doc" Edgerton through learning by doing.

Stolen goods adorn the organ at Old North Church.

The site where Charles Dickens gave his first public reading of "A Christmas Carol" in the US.

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

The "dragon babies" of southeastern Europe.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

Pilgrimage site for star-crossed lovers.

This replica of the Greek structure is in the heart of Nashville.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

Found art has transformed this Pittsburgh neighborhood into a psychedelic dream.

There aren't too many operational funiculars around, but Pittsburgh has two!

Famously misunderstood wonder of the ancient world

A historic grist mill and active sluice on the Black River.

This tiny New Jersey village has lived many lives but seems determined to remain a ghost town.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

The remains of the furnace and iron works that produced the massive Hudson River Chain still stand in the woods of New York.

This massive boulder is either a unique rock formation created by glacial melt or a magic energy vortex.