The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

One of only two commuter aerial tramways in the United States.

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

Read a book next to a Midtown waterfall.

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

The "Seinfeld" diner.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

Elevated freight railway turned wildly successful urban park.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

New York's oldest magic store.

Try not to get slimed in Tribeca.

A terrific purveyor of natural history objects and curios.

This iconic Lancaster everyman has been reading the same story since 1980.

This extraordinary Depression-era expenditure was modeled after a postcard of a Mediterranean hotel.

The home of possibly the least-loved U.S. president stands as a sort of unpopular Monticello.

South Philadelphia is home to Keith Haring's only surviving in situ collaborative public mural.

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

Yo, Adrian!

The oldest farmer's market in America is so ancient it was approved by the King of England.

This small-town library was the first in the world to be entirely supported by taxation.

Known as one of the most climbed mountains in the world, this barren peak is permanently bald thanks to an anti-wolf fire.

Former abode of notable poet, complete with literary references and stories of ghosts.