A blooming house of worship for the masses.

A simple plaque remembers an act of WWI terrorism that obliterated an island and forever scarred the Statue of Liberty.

Hidden in plain sight on the Hudson River is an abandoned train station where nature has taken over.

This evocative New Jersey statue memoralizes the Polish victims of a Soviet massacre.

On the Hudson resides one of the largest clocks in the world.

A winding, cliffside stretch of road overlooking the Delaware River.

Once the grandest synagogue in medieval Spain, it now stands as a memorial of the 15th-century Jewish exile.

A former steam-powered mill from the 1800s is now an industrial park with a giant steel dragon slide.

An archeological treasure trove stumbled upon by a couple of children.

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

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

The last living thing to come out of the rubble after 9/11 is now a symbol of hope and resilience.

A mysterious echo seems to defy the laws of acoustics.

This throwback amusement park is home to rides and unique storybook figures from the past.

All that remains of the once-booming chain is a single orange-roofed restaurant.

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

More than half of this Indian palace is drowned but it looks all the more spectacular for it.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

The third version of this tall sailing ship sits, rusted and burnt, in Lake Ontario.

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

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

The Roman city was the birthplace of various emperors and is home to one of the empire's most impressive architectural feats.

These paved rills bring freshwater into Altstadt and could spell wedding bells for whoever stumbles into the waters.

This underground church is topped with a 500-foot cross that is seen by many as a beacon of fascist hubris.