The world's largest fully steerable radio telescope.

Rusting away on the edge of New Jersey are the remains of a Cold War missile launch site.

Where the embers of the Big Bang were first detected.

Where the four original members of the Ramones hung out and revolutionized punk rock.

The final resting place of the great escape artist, where some still gather to wait for his escape from death.

The notorious headquarters of a corrupt political machine.

New York City's smallest piece of private property.

A clock designed to run with perfect accuracy for 10,000 years.

This English-inspired Maryland garden is home to acres of opulent plant life including bushes shaped into an entire fox hunt.

North America’s largest collection of horological devices and home to a colossal clock with a dizzying array of features.

A little marble compass above George Washington's (empty) tomb in the Capitol marks where D.C.'s four quadrants intersect.

This statue of the "father of television" stands prominently in the United States Capitol.

Tiny observatory made big contributions to the study of the Earth's motion.

The final resting place of the tragic king and queen of the Jazz Age is tucked away in a small Maryland graveyard.

The shelves in the back of this thrift store are devoted to saving, not selling, retro tech.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

The development and impact of electronic media showcased in a picturesque farmhouse in Maryland.

The world's oldest continuously operating airport was founded by the Wright Brothers.

An FDR-era tuberculosis sanatorium has stood abandoned in the suburbs of the U.S. capital for over 30 years.

Two dozen pinball games hidden away inside a most unlikely location.

A lawn full of retired spacecraft on display at one of NASA's first research labs.

A priceless collection of the Nation's cryptologic history.

This abandoned sea fort has become an accidental bird sanctuary.