Stones speckled along Harris Avenue reveal hidden nuggets of the past.

An American city stranded at the tip of a Canadian peninsula where strict adherence to the "49th parallel rule" became problematic.

An electrifying collection of gadgets and literature from the 16th through 20th centuries.

Bird dung painted this huge boulder which in turn inspired the name of a city.

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

The world's longest known cave system.

The home where a lovestruck Fitzgerald wrote his first published novel, "This Side of Paradise."

Home to the Amorphophallus titanum "Corpse Flower," which is among the largest flowers in the world and also smells powerfully of rotting flesh when in bloom.

The Midwest's reigning king of surplus stores is full of nothing you need and everything you want.

The only arched bridge made of stone on the entire Mississippi River.

This old residential building was once the largest flour mill in the world.

One of the world's premier laboratories for hydraulic engineering research takes full advantage of the water's power.

When flour explodes, it's not a pretty sight.

Downtown Minneapolis mixed art and function by turning some of their sewer covers into works of art.

This 1960s kinetic artwork has been restored and is once again whirling away in downtown Minneapolis.

This kaleidoscopic mural shows Bob Dylan throughout his transition from young troubadour to Nobel laureate.

A bronze statue on a downtown corner honors Minneapolis's favorite career gal.

Museum dedicated to the terror regimes of Hungary.

Possibly the world's largest hourglass only needs to be reset every New Year's Eve.

Uh, pardon me, ma'am, but I couldn't help noticing that there's a Columbo statue in the middle of Budapest.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.