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

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

Illegal drag racing two stories beneath Chicago’s streets.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

A spectacular remnant of an Adler and Sullivan masterpiece that was destroyed in 1972.

This alley in downtown Chicago held the bodies of over 600 people after the fateful Iroquois Theatre fire.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

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

This historic hotel invented the chocolate brownie.

This alley off Edinburgh's Royal Mile contains remnants of the city's seedier history.

Remnants of the 16th-century defensive wall still stand unassumingly within Edinburgh.

Now home to a drinking establishment, this building has a macabre history.

A sweet symbol marks the place where torturous executions were once carried out.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

This obscure walkway links Edinburgh’s Old Town with one of the city's prime vantage points.

The bell that once tolled atop a lost Edinburgh gate now hangs for all to see.

Brass bricks outline the locations of Edinburgh's lost, lively market stalls.

This 15th-century structure had a long, tortuous journey to its current location.

A 18th century graveyard and its astonishing cortege of macabre iconography.

This mundane post marks the old location of the city's main postal hub.

The remains of a massive blast furnace in what was once one of the country's largest iron-producing regions.

The mounds at this site were reconstructed with the help of archaeologists and historians.

The nearly 200-year-old building displays a perplexing grammatical error.

An office built to look like a giant basket.