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

This small park features a monumental fountain wall, providing a great photo opportunity in the middle of Houston.

What was once a summer home next to a waterfall has now become littered with graffiti and children in swimsuits.

When Azorean green tea meets volcanic hot springs water, a luminous brew is born.

This fairy-tale, neo-Gothic church in the Azores is a world of magical realism.

This abandoned five-star hotel is now a five-star urban exploration destination.

A 19th-century mansion houses the largest collection of gin in the European Union.

Europe's oldest still-operational tea farm also boasts a spectacular view.

As the highest point in the Mid-Atlantic range this stratovolcano offers spectacular views.

This historic patch of real estate offers a glimpse of colonial Boston.

Silverware in the sidewalk outside a grocery store cements this neighborhood’s Italian culinary history.

One of the indelible moments of the American Revolution took place at this location.

Millions of numbers carved in glass represent the tattoos forced upon victims.

A mysterious stone embedded at the base of a historic Boston building.

The final resting place of the first documented Chinese person in the United States lies in a Boston cemetery.

American revolutionaries and British soldiers alike are buried here in the fourth-ever cemetery in Boston.

The Boston square dedicated to the dark poet who was born nearby.

A plaque memorializes the Boston location of one of the largest nightclub fires in history.

The history of the tea trade is told in bas-relief on this historic pair of Boston doors.

America's original house of worship for Spiritualism, the religious movement based on communing with the dead.

Painstakingly built dioramas sit unnoticed in a Boston office building.

A master plumber has turned his love of art and toilets into a folk museum that's not taking the piss.

A bit of retro transportation flair preserved in the world's largest department store.

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.