This unusual structure may be on its way to becoming a cultural landmark in Toronto.

Originally a brothel during the Klondike Gold Rush, this bar once used dolls to denote when ladies were working.

This haunted hotel built on natural springs once served as a hospital for a quack doctor promising a cure for cancer.

This historic hotel invented the chocolate brownie.

Illegal drag racing two stories beneath Chicago’s streets.

The history of whiskey and all of its boozy glory, from Colonial days to modern American cocktail culture.

This restaurant proudly displays bread signed by the 39th president.

It may take some time to locate, but it's sure to warm even a heart of stone.

This modern castle sat empty for decades before a fire inspired its builders to complete its luxury halls.

Kentucky's longest operating jail is now a spooky spot to spend the night.

Eight rare Corvettes are swallowed up by a sinkhole in Kentucky's National Corvette Museum.

At 135 years old and counting, this historic print shop is heaven for poster nerds and music buffs.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

One of two identical monuments marking the sites of military training encampments in Peoria, Illinois.

A massive bur oak tree believed to be some 500 years old is the centerpiece of this quiet urban greenspace.

The world's third-largest scale model of the planets.

These Depression-era WPA sculptures have made a couple of stops over the years.

A collection of 11 million buttons illustrates the human toll of the Holocaust.

The final resting place of the world's first nuclear reactor.

The final resting place of up to 6,000 Confederate soldiers, the largest mass grave in the Western Hemisphere.

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

A tunnel with windows, so you don't miss out on the impressive views.

Free public park and gardens filled with peacocks and peahens.

One of the last surviving C-97s sits in a field in front of a Wisconsin inn.