This monolithic statue was erected in honor of Chief Black Hawk (even if it wasn't made to look like him).

An unfinished rail tunnel that has since been used to house cheese and bats.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

A well-preserved network of cavernous tunnels have spent silent centuries removing Toronto's waste.

One of Canada's most incredible rare book collections holds hundreds of thousands of gorgeous tomes that the general public can touch.

Lost subway station nestled beneath Toronto's busy commuter line.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

This bridge is haunted by the ghost of a distraught mother.

This North Carolina museum is keeping the pinball craze alive, with a little Space Invaders on the side.

This giant iron playfully pays tribute to an early 20th-century architectural trend.

An off-the-beaten-path place to literally hang beneath Milwaukee's Holton Street Bridge.

A circus of light and sound forms a sensory ode to an iconic train that will never pass through town again.

A key producer of charcoal iron in the early 1800s, the structure still stands today.

The massive, original Colgate Clock is mounted on a defunct factory building that was once a prison.

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

This former tuberculosis research hospital endeavored to cure the dreaded disease with fresh air and positive attitudes.

Unique tower has outlasted a takeover of the company.

A local scoured more than 1,000 acres for stone to create his masterpiece.

An abandoned theme park with a strange and tumultuous past.

One of the few surviving "Wigwam"-themed motels.

This award-winning men's bathroom was just too beautiful to not allow women to see.

When Motown musicians came to Nashville in the 1960s they stayed at this historic record-pressing company because hotels wouldn't host them.

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