The only surviving prototype for Buckminster Fuller's house of the future.

The writing studio of an American adventure author, built in the style of a medieval castle.

A restored 114-year-old railroad station heralded as the most photographed depot in the United States.

A school teacher's massive and terrifying self-built castle.

This "railway" for boats continues a waterway over a road.

A couple turned their front yard into an artistic masterpiece.

An extraordinarily ornate museum in San Diego holds wondrous anthropological treasures.

This little gem of Spanish Colonial architecture has been abandoned since the 1950s.

This former Indiana quarry has been transformed into a park and SCUBA site where divers can explore the drowned mining equipment.

An opulent testament to the boom-and-bust history of industry in north central Indiana.

Along this stretch of Indiana roadway resides a giant insect composed entirely of scrap metal.

This relic of transportation history still stands in this Indiana city.

This giant rock arrived at this quiet park thousands of years ago on the back of a massive glacier.

A very big rock just plopped down in the New England woods.

Glacial erratic or man-made dolmen? It probably wasn't druids.