This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

The former hotel where Tesla invented the radio.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

Macabre astrological automaton clock dating to the late 1400s.

Venice's island of the dead.

100 year tradition of fist fights, marked by marble footsteps.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

A vertically floating hemlock controls the waves and weather at Crater Lake.

Oldest building in California still in use.

A curious fountain that has no water and includes Satan, a crab, and 9 giraffes.

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

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

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Commemorating the spot where the famous scientist fed his pigeons.

An artist's cute bronze subway sculptures belie his violent artistic past.

Elevated freight railway turned wildly successful urban park.

The most confusing clock in New York.

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

Tucked in the back of this amazing antique store is an important piece of medical history.

A hidden "place of interment for gentlemen."

Great place to have a drink and a bite to eat in an atmosphere laden with New York's Bohemian past.

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

A terrific purveyor of natural history objects and curios.

Ever wanted the laymen's version of your credit card fine print?