Elevated freight railway turned wildly successful urban park.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

Secret North Korean passage discovered below the world's most dangerous border.

One of only two remaining Victorian-era greenhouses in New York.

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

Though its celestial ceiling is impressive, the true star is the vast collection of French books.

Try not to get slimed in Tribeca.

The famed architect designed this Minnesota gas station of the future with a lookout tower.

A museum within a museum, devoted to history's most questionable medical devices.

One of the foremost Sherlock Holmes collections is hidden away at a Toronto library.

This Toronto garden collects stares and tchotchkes in equal measure.