San Francisco's oldest surviving monument and meeting place for 1906 survivors.

A still functioning vaudeville carousel that has operated for over a century boasts a colorful menagerie and past.

San Diego's most historic and haunted home.

One of the few remaining carousels built by master amusement park carver Charles I.D. Looff.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

The highest point on the island known for buildings that touch the sky.

The famous author's cottage hideaway.

Mysterious 500-year-old tapestries depict a unicorn hunt.

A Manhattan Episcopal church with an eerie underground crypt.

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

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

The notorious headquarters of a corrupt political machine.

The most confusing clock in New York.

Test your business savvy and play the market for cocktails at this stock exchange-inspired watering hole.

Red frames showcase remnants of one of New York's original subway stations.

This exemplar of modernist architecture is meant to captivate and inspire students of the Cooper Union.

A hidden "place of interment for gentlemen."

Become a prohibition rebel.

The competition: breathe deeply as long as you can.

Dentist's hated concrete colossi are now beloved icons of the community.

A sudden forest of traditional Papua New Guinean art works is hidden in a corner of Stanford University.

Four miles of pipelines form the model of still-functioning retro-tech efficiency.

Rodin's famous depiction of Dante's 'Inferno', amidst a sculpture garden of many of his other works.