The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

Perfectly preserved ancient monastery in an impossibly dramatic location on a rocky island in the Atlantic.

This burial pyramid in central Ireland is thousands of miles and thousands of years away from its Egyptian inspiration.

This railroad overpass is said to be home to a murderous goat-man whose very legend has led to very real deaths.

The grave of the iconic Kentucky Fried Chicken mascot features a bust of the man behind the goatee.

This candy shop has been serving up sweets to the Louisville area since the 1850s.

Ruined pieces of stone and a swimming pool are all that remain of an amusement park swept away by a flood.

This hidden stream beneath Indianapolis makes an appearance in the best-selling novel "Underground Airlines."

A 30-year-old Sycamore tree grown from a seed taken to the moon and back.

This old steel industry company town has a tradition of parking cars on the sidewalk so people can walk in the narrow streets.

Built to house a chapter of the Knights Templar, this grandiose building is a relic of Freemasonry in Chicago a century ago.

This modest post office sits on the site of H.H. Holmes' famous murder castle.

The palatial McDonald's that inspired Wesley Willis.

A century-old network of freight tunnels underneath the city's historic business district.

This $3 million model train takes you through Chicago, Seattle, and the thousands of miles in between.

This historic hotel invented the chocolate brownie.

These pretty kitties killed and ate as many as 135 railway workers.

A little-known subterranean street runs under some of the best-known buildings in Chicago's River North.

All of Chicago's wood-paved streets are long gone but two alleys remain.

This unauthorized stone mermaid was secretly carved out of public stone before being permanently preserved.

What was once one of the country's largest confectionary plants is now an abandoned ruin, but is still pretty sweet.

This museum celebrating the almighty dollar lets visitors literally stand in the shadow of a million bucks.

A hollow cement depiction of time's inexorable effect on the human body.

A gothic church spire sits atop this skyscraper, the tallest church in the world.