This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

Look closely and you’ll notice that the color changes a third of the way up the tower.

This former Roman Catholic Church still contains the embalmed hearts and organs of 22 popes.

Golden and naked, the figure that was once the highest point in New York is all that remains of the second Madison Square Garden.

Yo, Adrian!

A gateway to a mysterious network of underground tunnels.

A tower devoted to — and modeled after — the Divine Comedy.

A bright little alley in La Boca is a part of tango history.

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

105-foot wide giant metallic flower blooms anew every day in the heart of Buenos Aires.

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

A beautiful young girl said to have been buried alive in her coffin…

Scattered around Atlanta are little doors with big charm.

Mai Tais and Navy Grog served up in one of the original tiki bars.

A huge, bustling local market in Panama City.

Healing Springs that once ran red with soldiers' blood.

An alchemist's "magic door" stands in the middle of a Roman park.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

The remains of Martha, the last known passenger pigeon, serve as a tool to educate about conservation.

The "lovely red Vega" of the legendary record-settling pilot.

One of the few remaining carousels built by master amusement park carver Charles I.D. Looff.

This intricate Hindu temple is the largest of its kind outside of India itself and was constructed like a giant puzzle.

Developers built a Walmart around one family's plot and constructed a mausoleum in the parking lot.

This angular brutalist playground turns playtime into modern art time.