A charming beach town in Turkey captures all the colors of the rainbow.

This gem is often wrongly overshadowed by the larger, newer Metropolis church in Athens.

The site where hundreds of Greeks were tortured by the Nazi secret police is now a cosmetics store.

This small chapel holds the mummified heart of one of the heroes of the Greek Revolution.

One of Philadelphia's largest murals resides hidden under this bridge.

Yo, Adrian!

This beloved marketplace mascot poops money and grants good luck.

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

The Cold War-era "underground Pentagon" is a sprawling subterranean hideaway for the Defense Department.

A museum honoring Oklahoma military service, where you can look into Hitler's mirror and see a Mickey Mouse gas mask.

An Irish Memorial commemorating those who perished due to potato blight.

Elevated freight railway turned wildly successful urban park.

A dilapidated dock tells the story of Titanic’s missed arrival.

This historic building housed the surviving crew members of the Titanic, who were left destitute after the wreck.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

Historical figures from New York City's Catholic community reside in Midtown.

A historic 1890s architectural masterpiece with an iconic clock tower that, once open to the public, now faces an uncertain future.

An odd, ancient window that may have once been part of a brutal prison is embedded in the side of New York's Police Plaza.

The Underground Railroad passed right through this historic Brooklyn Heights church.

A popular European tradition makes its way to the states on one of America's most famous bridges.

An artist's cute bronze subway sculptures belie his violent artistic past.

This study room in the New York Public Library saw the creation of one of contemporary America's greatest traitors.

One of the last few places in Manhattan that employed a pneumatic systemic keeps it on display.

A very classy 1920s-era bar right in Grand Central Station.