"A hideous albatross in the Hudson River Valley."

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

A quiet and contemplative oasis in the middle of New York's bustle and riot.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

Why have you never heard of the second most popular tourist site in New York?

The home of aviation trailblazers, in a remote corner of the big city.

New York's southernmost subway station is whimsically wavy.

A playground inspired by differential calculus dangles from the ceiling of the Liberty Science Center.

The last living thing to come out of the rubble after 9/11 is now a symbol of hope and resilience.

This 22-floor tower's Skydeck offers panoramic views of Amsterdam.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

The fairy tale castle of the “fairy-tale king,” this was also the inspiration for Disney’s “Sleeping Beauty.”

A beautifully eclectic mix of architectural styles.

A hidden church in a hidden courtyard tells the story of the Miracle of Amsterdam.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

Look closely and you’ll notice that the color changes a third of the way up the tower.

Daredevil repair workers can worm their way out the access hatch, loop ropes over the apex and rappel down the monument.

"Congress may voluntarily remain in session throughout the summer, in order that our Congressmen may be protected from the intolerable discomforts and dangers of the ordinary outdoor weather!”

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

Home to items never before seen by the public.

The abandoned ruins of America's first private zoo are open for exploration in the Catskills.

The highest point in the state of New Hampshire, and while unlikely "the worst weather in the world," it sure seems that way to hikers.

Every year model trains zip through a miniature New York City that's now 150 landmarks strong.