This Manhattan skyscraper is a reminder of the brief but glorious age of urban air taxis.

The origins of midtown Manhattan's anachronistic wooden farmhouse remain a mystery.

A replica of a 7th-century church hides in plain sight in the middle of the concrete jungle.

A reminder to choose water over wine since 1888.

This anonymous businessman sculpted in bronze became an enduring memorial after 9/11, and had been mistaken by rescue workers for a survivor in the rubble.

This study room in the New York Public Library saw the creation of one of contemporary America's greatest traitors.

Touching mementoes from those who didn't make it back from World War I still hang in one of New York's oldest bars.

The remains of the great moral philosopher reside in a university in London.

Hear the quietest sound from across the dome.

Two giant painted cooling towers make for one of the world’s most epic bungee jumps.

The facade of this relic from the Klondike gold rush is decorated with over 8,800 pieces of driftwood.

These grassy undulations on a stretch of University of Michigan campus aren't bad landscaping, they're art.

The studio of influential composer Charles Ives is perfectly reconstructed, hidden in the back of the American Academy of Arts and Letters.

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

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

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.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

The oldest bibliophilia club in America, with exhibitions on historic books and graphic arts.

A Manhattan office building is home to the world's largest chess board.

Everyone from Mark Twain to Teddy Roosevelt has a pipe hanging from the walls of this historic chophouse.

A bit of retro transportation flair preserved in the world's largest department store.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

A very classy 1920s-era bar right in Grand Central Station.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.