The oldest continuously inhabited street in America.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

Possibly the world's largest hourglass only needs to be reset every New Year's Eve.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

Electrical curiosity museum housed in an old transformer station.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

This chimerical bridge/tunnel appears to dead end right into the sea.

Budapest's Communist-era statues, banished to the suburbs.

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

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

The site of Paul Revere's historic two lantern warning.

Narrowest house in Boston.

Ice cream stand, snack bar, and time capsule of milk conveyance.

This bridge was the birthplace of a unit of measurement based on a fraternity joke.

An enormous, inside-out glass globe built in 1935.

This impressive Boston holy house is the American mecca for Christian scientists.

This wrecked airplane has been sitting on a black sand beach since the 1970s.

This innocent-looking townhome is actually a subway exit.

A working metal shop and venue for outrageous art and music shows in a former cannonball factory.

A big shiny gin and whiskey distillery in Sunset Park.

Once a ferry dock, radio transmitter, and now a new Greenpoint park.

A living archive of urban activism and space reclaimed.

Most prolific publishing house in the 1600s open to the public.

Cozy basement bar sports an inventory of over 2,000 beers.