These century-old beehive-shaped kilns were built to produce charcoal for nearby mines.

One of few remaining antique carousels with stationary animals in the U.S.

A single handprint, which, according to Ohio State University legend, cannot be scrubbed off.

The world’s largest collection of angel figurines includes 600 black angels donated by Oprah Winfrey.

A palatial art deco restroom.

A tiny plaque hidden miles into the Washington wilderness is all that remains to honor a shipwreck that left 18 people dead.

One man's quest to save his town with a trail of record-breaking sculptures.

One North Dakota man's vast collection of rare rocks, polished orbs, and geological wonders.

This sky-high radio mast is formerly the tallest man-made structure in the world.

The oldest still-existing mosque in the United States sits in a remote prairie in North Dakota.

A wax effigy of St. Valentine hides one of the saint's relics.

Abandoned since the 1950s, the streetcar lane beneath the heavily trafficked bridge lays empty and unused.

Corn-inthian columns with a uniquely American take on neoclassical architecture.

Need a hardcopy of the 50-title Code of Federal Regulations? This is the place.

The granite monument is engraved with the image of the talking horse's head coming through a barn door.

The inventor of the iconic Pringles can was so proud of his invention he was buried in one.

A brick-paved former section of the historic coast-to-coast highway.

A precariously balanced rock perches on the edge of a cliff created tens of thousands of years ago by glacial erosion.

The "Skinny House" is made from scrap, salvage, and a neighbor’s kindness.

Fresh wooden posts have been added to ancient holes to recreate a primitive henge clock.

A fence constructed completely of skis on Monroe Street.

A peg-legged tightrope walker did not reveal his name as he was dying, and so he was buried as “Rope Walker."

The summit Roosevelt conquered before he descended to become The Chief.

Triangular House built on a leafy residential street in St. Paul.