Gang fights don't just happen on the streets, they happen under them too.

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

The best place in New York to pick up the controversial, notoriously foul-smelling Asian "king of fruits."

Historical figures from New York City's Catholic community reside in Midtown.

Feral cats keeping the rodent population at bay all across Greenpoint waterfront.

Avoid gangster interaction while window-shopping.

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

The oldest bibliophilia club in America, with exhibitions on historic books and graphic arts.

Abandoned power station once home to a squatter community, now being developed into an arts center.

A band of aerialists and circus performers putting on incredible shows in East Williamsburg.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

Tucked away amidst some of the most famous addresses in the world is New York's only fraction of a street.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

Home to the infamous "Typhoid Mary" and the worst loss of life in New York's history prior to September 11, 2001.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

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

A open air theatre built on a cliff by an eccentric British woman.

The granddaddy of English geoglyphs dates back to the late Bronze Age.

This 11th century tower is said to be the oldest building in Oxford.

Used as an example in one of the first dictionary entries for "museum" in 1706.

An extraordinary collection of scientific instruments - and Einstein's chalkboard - inside the world's oldest purpose built museum building.

This battery powered bell has been ringing since 1840 and is one of the worlds longest running science experiments.

Ancient Egyptian wigs, South American feather headdresses, a bounty of anthropological artifacts in Oxford.

Home to the most complete dodo remains known - one head, and one foot.