Twice a day one of these tragic bronze mariners drowns with the tide to remember all those the sea has taken.

One of the few remaining American elm trees in New York’s Tompkins Square Park was the birthplace of a new religion.

This small New York museum examines Chinese history from its origins right up to its arrival in the city.

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

This curved Manhattan building was built to house the opulence of John D. Rockefeller's oil empire.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

Commemorating the spot where the famous scientist fed his pigeons.

This wall on a street corner in Lower Manhattan has been a blank canvas for a rotation of renowned artists since the 1980s.

Cryptic messages embedded in the New York City sidewalk.

A clock set into the concrete outside a Manhattan jeweler has been telling time underfoot for over a century.

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

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

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

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

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

For over 30 years the walls of this Harlem schoolyard have been a gallery of street art by "Kings and better."

A focal point of in Denver’s skyline for over a century, inspired by a Venetian basilica.

This was once the home of Gahan's Saloon, Denver's most storied speakeasy.

The huge collection of paintings of the American West is one of Denver's best-kept secrets.

The highest paved road in North America winds its way up Mount Blue Sky in Colorado to an altitude of 14,130 feet above sea level.

One of the greatest heroes of the Titanic tragedy came from humble beginnings to this beautiful home.

This spectacular track has run continuously since 1882.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

Come for the waffles, stay for more waffles.