This prehistoric sinkhole lured exclusively male mammoths to their death, much to the delight of science.

South Dakota's oldest operating brewery is housed inside a historic firehouse.

Dedicated to the history of the 1,000 nuclear missiles that once covered the Great Plains.

A goddess-topped water fountain in Chicago was created thanks to the dreams of a thirsty newsboy.

These chunky stone towers out in Lake Michigan are the key to Chicago’s drinking water.

Landmark dedicated to the plight of the American Indian in the 21st century.

17,400 lbs., 12 feet in diameter, and 29 years in the making.

This alley-cum-fan gallery in the ex-Nirvana drummer's hometown holds the world's largest drumsticks.

Beside a busy highway, a colony of Great Blue Herons raises hundreds of offspring each year.

But did the famous feminist and abolitionist ever really say those iconic four words?

This campus museum commemorates a national tragedy.

The birth home of one of cinema's legendary actresses.

Maine’s only official memorial to the Underground Railroad.

Its unique collection details the history of the state's svelte railroads.

Tour the world's largest deep-hole dimension granite quarry, where you can view the plant where gravestones are made and roll a ball down the outdoor granite bowling alley.

A Frankenstein blend of science and art allows one tree to produce 40 different types of stone fruit.

An abandoned, rusty old relic of railroad history stands at attention over the Cuyahoga River.

A concrete block embedded with thousands of pulled teeth was created by a local dentist to memorialize his dog.

This lovely public park has an intriguing past and unique wooden bridges made of concrete.

One of the largest pieces of scientific equipment ever carried on a NASA space shuttle sits in a Chicago alley.

First planned industrial community in the United States.

The world's only three-story rotary jail is now a museum to a bizarre trend in prison design.