A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

This elaborate towering structure was once famed for its revolutionary height.

World's first "penitentiary," meant to be humane, drove men insane.

Captain America, Sub-Mariner, and the Human Torch were all born in this art deco Manhattan masterpiece.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

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

Fittingly, America's museum of architecture is itself a magnificently designed old building.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

The "lovely red Vega" of the legendary record-settling pilot.

Washington's iconic carousel has a nice piece of Civil Rights history.

The fairy tale castle of the "fairy-tale king."

Daily jousts and dancing barrel makers in Munich's mechanical clock.

A hidden "place of interment for gentlemen."

A storefront museum in Asbury Park honoring the Jersey Shore’s deep history of mystery—including the Jersey Devil.

A reservoir of vintage pinball machines and arcade games for the nostalgic and thrill seeking.

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

There must be a pun in this haystack somewhere...

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

These 20-foot sculptures will help guide you from the local train station to the local sculpture garden.

A unique sculpture park that specializes in the huge and bizarre.