Berry Gordy Jr.'s old home was the original headquarters of Motown Record Corporation.

The Beaux-Arts aquarium boasts a vast collection of saltwater and freshwater fish on an island in the Detroit River.

These enduring murals depicting a distinctly Marxist tribute to capitalism could not even be defeated by McCarthyism.

It's gunky, it's gross, and it's been freed from the sewer and put on display.

The world’s largest Masonic temple was saved by the White Stripes.

This sprawling bookstore spans four floors and has more than a million books in stock.

Opulent downtown movie theater now houses cars as an indoor parking garage.

To truly appreciate Detroit's landmark skyscraper, you have to step inside.

Abandoned outpost once home to a murderous tyrant.

The Byzantine, pre-Columbian, and medieval art at this stately mansion are some of the most under-appreciated collections in D.C.

Long-abandoned trolley tunnels just a mile away from the White House are turning into an art space.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

Over 120,000 curious objects that have shaped our modern world.

This historic, palatial theater is now one of the world’s most beautiful bookstores.

Buenos Aires' city of the dead contains some very famous remains, including Eva Perón.

A vast necropolis where you'll find the elaborate mausoleums of Argentinian tango stars.

A magical world of elves and fairies tucked amongst the trees in Colombia.

Venice's island of the dead.

In Egypt's expanding metro area, many of the neighbors are dead.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

The oldest and smallest cemetery in Paris is only open to the public twice a year.

The narrowest street in Paris.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.