Just like in Hollywood, Madrid has also a forgotten walk of fame.

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

This landmark cemetery in Boston was created more than 300 years ago.

A rare set of strings by famed instrument maker Antonio Stradivarius is on display in the Royal Palace.

Astounding collection of coin-operated games and automata.

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

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

The most confusing clock in New York.

Elevated freight railway turned wildly successful urban park.

This magnificent castle grew from a small Moorish fortress, and reportedly inspired two iconic Disney castles.

In the fictional world of Kcymaerxthaere, celestial wonders marked a portal to a powerful route of travel at this site in Madrid, Spain.

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

The next-door homes of two very different musicians, George Frideric Handel and Jimi Hendrix.

These wire animal sculptures commemorate the exotic inhabitants that once called the Tower of London home.

This lucky bronze frog was gifted to Madrid by a casino.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

The rose garden in Regent's Park where Pongo and Perdita met for the first time in Disney's "101 Dalmatians."

The Metropolitan Police refurbished the blue box (perhaps not coincidentally) the same year "Doctor Who" returned to TV screens.

A scattered trail of street art adds a pop of color to the city's stark structures.

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

Famously misunderstood wonder of the ancient world