A single light illuminates one man's overshadowed contributions to street lamp history.

This Rhode Island mansion was a stand-in for the exteriors of Collinwood in the original "Dark Shadows" series.

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.

A crumbling stone stable and carriage house are all that remain of a manse that was once filled with Egyptian artifacts.

The world's third-largest crystal sphere has sat in the Penn Museum since 1927 with the exception of one outlandish theft.

This forgotten building was one of the few Philadelphia-area breweries to survive Prohibition.

Golden and naked, the figure that was once the highest point in New York is all that remains of the second Madison Square Garden.

Yo, Adrian!

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

In the early 1800s, surgery was also a show.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

This splendid Versailles-inspired mansion has the largest French-style formal gardens in North America.

A rare view of a preserved Victorian science museum.