This peculiar lake of pitch is so thick and viscous that one can walk on its surface.

A fascinating little museum dedicated to the thousands of chemical substances concealed in our food.

Model Trains and Much More in Hamburg.

The house that birthed The Old Man and The Sea is now a museum devoted to the old man who wrote it.

A focal point of the Cuban government, this city square features one of the most iconic images in the country.

A Cuban artist reclaimed his impoverished neighborhood as a dreamy folk art kingdom.

In terms of history and architecture, this is one of the most remarkable cemeteries in the world.

Nikola Tesla's former home contains an homage hidden from plain sight.

No one knows how many bodies are in this vault in a Chicago public park.

Home to a protest movement, a bombing, and a dramatic change in labor history.

Fragments of architectural wonders from around the globe are embedded in the newspaper building's walls.

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

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

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

A monument to the art of slicing people open.

A shining sculpture made of 3,115 lights, the number of visible stars in the Northern Hemisphere.

A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.

One of the steepest streets in the United States makes an intriguing challenge for cyclists.

A Montreal deli that was so beloved that it was allowed to circumvent their laws of language.

Montreal's giant farmer's market is a foodie's best friend, especially in the winter months.

An artist weaves "wooden quilts" with scraps salvaged from his Katrina-damaged home in Tremé.

Parts of the civil rights movement unfolded in this historic eatery, helmed by the "Queen of Creole Cuisine."

If New Orleans is the birthplace of the "cocktail," why does their own museum of cocktail memorabilia beg to differ?

Made of giant chains and hung with shackles, this iron cross honors those unknowns who perished under American slavery.