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

Last residence of H.P. Lovecraft featured in his story "The Haunter of the Dark."

Narrowest house in Boston.

Historic Hull Street was actually the first street with a proper name in the Boston area.

This landmark cemetery in Boston was created more than 300 years ago.

Books bound in human skin and H. P. Lovecraft's letters are among a few of the treasures this library has to offer.

The headquarters of the famous Yale society.

A Red Hook dive bar that is holding onto its roots.

An unconventional space for art and science housed in a massive old warehouse.

A cruise terminal that changes the atmosphere of Red Hook's industrial waterfront.

Two monstrous warehouses. One now holds priceless works of art, the other stands abandoned and dilapidated.

The site where Joe Gallo kept his guns, pet lion, and launched an all out mob war in 1960s Brooklyn.

The longest continuous underwater road in North America was built at the insistence of Franklin Roosevelt.

A modern zoetrope on the New York City subway.

Plot your trip through the city on the sidewalk.

One kilometer of thick brass rod laid out before your eyes.

Hear the quietest sound from across the dome.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

This turn of the century masterpiece has a mysterious goaty interloper.

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

Golden Gate Park's historic collection of plants.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

The remains of a ruined mansion memorialize the 1906 earthquake.

Depicting scenes of everyday life - and specific individuals - in Great Depression era San Francisco.