This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

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

The only structure left with direct ties to the Salem witchcraft trials of 1692.

A crumbling hospital from the 1850s on Roosevelt Island.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

Activists are fighting to preserve these unfinished highway ramps as a tribute to the citizen revolt that halted their construction decades ago.

Spanning an elevation of 160 feet and containing 388 steps, this is Seattle's longest staircase.

The "Seinfeld" diner.

Twin Peaks' real life Double R Diner has been restored to its damn fine television look.

Amsterdam's Red Light District leaves little to the imagination.

Amsterdam's former hotspot for public executions and dissections.

One of Amsterdam's narrowest houses is located right across the canal from its widest.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

Seven mini rowhouses fill the gap between 54 and 70 Westerstraat.

A beautifully eclectic mix of architectural styles.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

A public urinal so pretty, it was declared a national monument.

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

The mysterious empty cupola behind the monumental arch points to an ancient prophecy of Delhi.

A startling, centuries-old subterranean marvel hides in plain sight.

The former Willingdon Airport started operations in 1929, in India's capital, Delhi. Now, it's used for maintenance runs and helicopter rides.

This ruined relic of the medieval city of Jahanpanah is a quiet oasis in the middle of New Delhi.

This opulent 16th-century Maharaja’s palace is a unique mix of Hindu and Muslim designs.