A lasting remnant of The Blitz.

The oldest residential street in Europe also features an optical illusion.

Ask nicely, and stewards of a centuries-old charitable tradition will give you free bread and beer.

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

An unlikely neo-Gothic castle in the Paraguayan countryside.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

One of New York's best collections of pinball is hidden in a secret bar in the back of this laundromat.