Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

This legendary city has been a tourist attraction for centuries.

Carvings in Turkey's Marble Road may have directed ancient Romans to a hidden brothel.

The ancient latrines of the Greeks, in all their public glory.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

World's largest bell sits on the grounds of the Kremlin in Moscow.

Former headquarters of the KGB.

This building holds the embalmed remains of the leader of the Bolshevik Revolution.

A 250-year-old timepiece-automaton adorned with golden mechanical birds, which still sing to this day.

A Yiddish theater turned movie house turned rock and roll landmark turned gay disco turned bank.

Twenty-three trees, each paired with a basalt stone, line a street in Chelsea, continuing an urban project started by German Fluxus artist Joseph Beuys.

This Manhattan skyscraper is a reminder of the brief but glorious age of urban air taxis.

Storage warehouse of the rich and famous.

This monument to a veteran of the Mexican-American War is one of only two in Manhattan that serve as an actual mausoleum.

A reminder to choose water over wine since 1888.

Rat sculptures try to infiltrate the Graybar Building in an architectural tribute to New York City's nautical history.

The oldest Methodist church in the United States has been spreading the good news for over two centuries.

This humble historic facade hides a history of boozing and the gentlemanly sport of rat-fighting.

Set sail on a small scale.

The one-time epicenter of American songwriting is now a little remembered Manhattan commercial block.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

The 28-foot granite map plots the locations of 40 theaters in New York City.

Cheap pizza and all of your naughty bedroom needs housed in a stunning example of Art Nouveau architecture.

During the 19th century, you could pay for violence off a prix fixe menu on this Manhattan street.