A mysterious echo seems to defy the laws of acoustics.

The first evidence of some of the Earth's earliest life was found in this fossilized undersea grotto.

A Manhattan courthouse hides a small but scathing memorial to Holocaust injustice.

Unlock the secrets of the conjuring arts.

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

Great place to have a drink and a bite to eat in an atmosphere laden with New York's Bohemian past.

The beautiful tunnel that ran from the lobby to Penn Station is still hidden underneath 34th Street.

After surviving abandonment, this powerful Latin American mural is alive again.

Nikola Tesla's former home contains an homage hidden from plain sight.

A good place to research the Freemasons, esoterica, occultism, and hermeticism.

Cryptic messages embedded in the New York City sidewalk.

A masterpiece of LGBT art has been restored in what may now be the most valuable restroom in America.