This replica of the Greek structure is in the heart of Nashville.

This award-winning men's bathroom was just too beautiful to not allow women to see.

This museum is dedicated to the little known ancient Roman history of Vienna.

Physicist’s epitaph provides final confirmation to a career of turmoil.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

The townhouse where the "Blood Countess" Elizabeth Báthory started her murderous career.

The land is home to swimming ponies and a legendary 18th-century treasure.

The romance of early commercial flight still fills this Art Deco destination.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

The remains of a historic plantation nestled in between a parking lot and the rental car return at Reagan National Airport.

Museum dedicated to the terror regimes of Hungary.

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

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

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

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

Elevated freight railway turned wildly successful urban park.

The very first subway station in New York City is beautiful, decked out in chandeliers, and ... abandoned?

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

The oldest continuously operating fish market in the United States.

One critic described it as "middle Mussolini, early Ramses, and late Neiman-Marcus." Another called it an architectural "natural disaster."

The unique traffic pattern named for an influential urban planner is also known as the Pedestrian Scramble.

An obscure federal monument honors the French diplomat who served as Ambassador to the U.S. during WWI.

This seemingly out-of-place gas station by the Watergate hotel was once described as the most expensive gas station in the world.

The bank that helped fund the Mexican-American War and the purchase of Alaska met its downfall after helping Augusto Pinochet launder money.