The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Hans Christian Andersen for the postmodern world.

Piano-making empire filled with 200-year-old steam machines still churning out 1,000 instruments a year.

The oldest private residence in New York City.

Nine nice parcels of land along a flight path offer a quiet respite... until a plane soars overhead.

A remnant from the golden age of aviation still in use today, Pan Am's Clipper service took off from this Art Deco gem.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

Revolutionary War casualties fill the only 17th century structure remaining in Manhattan.

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

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

Come for the pastrami, stay for the million-dollar art.

This suburban enclave is home to a very unique art exhibit.

This abandoned seaside fortress is now simply an imposing ruin being taken back by nature.

A former seaside jewel built for the everyman is now simply a neglected art deco fortress.

This 19th-century clock has been restored to help withstand the harsh environment of its seaside home.

This enormous banquet-themed artwork honors over 1,000 notable women throughout history.

A Wisconsin kitsch palace from the 1930s lives its second life in 21st-century Brooklyn.

The oldest Dutch colonial stone house in New York City is a hidden gem on the border of Brooklyn and Queens.

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

Check out the underground party scene at the "Burning Man of Brooklyn."

An 1883 schoolhouse now home to collective of artists.

Two community gardens under the elevated subway lines on a very busy commercial strip in Bushwick.

This 19th century brick building in Brooklyn stands out like the anachronistic landmark that it is.

The childhood home of one of America's greatest unsung troubadours still stands in a much changed Brooklyn neighborhood.