Former villa and estate of James Deering developed to preserve native tropical forests.

Astonishing collection of helmets, scientific instruments, and medical models.

Little Red Lighthouse under the George Washington Bridge.

The only theatre in the world constructed specifically for sound movement.

The world's brightest bioluminescent bay.

The world’s first penitentiary, meant to be humane, drove men insane.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

Art deco landmark on the outskirts of Washington, D.C.

Largest Roman Catholic church in North America.

Oldest surviving example of a Dutch saltbox frame house in America.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

Designed by Maya Lin, the memorial honors 41 individuals who died fighting for equal rights between 1954 and 1968.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

Statue dedicated to the star of an old television show.

Bat house that has only ever housed bat for one night; they all flew away and never came back.

This massive redwood tree has a hole in the base big enough to drive through.

The oldest continuously inhabited street in America.

Vast stretch of tide-pools with a unique Moroccan charm.

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

A Beaux-Arts triumph rises from decades of decay to become the heart of a new innovation district.

God's Saharan sandbox of wrath.

Berry Gordy Jr.'s old home was the original headquarters of Motown Record Corporation.

Once called the "Polish Gold Coast" it is an icon of the neighborhood that bears its same name.

A 120-year oil leak slowly unleashes more gallons of oil than the Exxon/Mobil disaster.