If Hello Kitty were Mickey Mouse, this would be Disneyland.

The often-overlooked ruins of one of the first buildings designed by famous landscape architect Frederick Olmsted.

Ralph Waldo Emerson spent two years living here decades before it became a Frederick Law Olmsted-designed park.

The bears may be gone, but their old cages can still be found.

A beautiful Victorian-era cemetery, complete with a miniature village.

The front yard of an Upper East Side town house hides the last fragment of one of New York's most famous theatres.

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

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

The final resting place of a space program monolith.

Panorama exhibition hall in old silent theater with a beautiful backyard garden.

A cake-themed art installation tucked away in historic Chinatown.

Crypt mausoleum in cathedral's basement contains relics of third century Roman martyr, Saint Vibiana.

These mystical miniature houses bring a touch of magic to the New Jersey woods.

A red brick monolith is all that remains of New England’s first commercial brickyard.

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

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

The crown jewel of the Queens Museum is a nearly 10,000-square-foot architectural model of the city originally built for the 1964 World's Fair.

A layered tribute to the work of mosaicist Isaiah Zagar.

The official atomic museum of the United States explores the explosive and productive history of a much maligned energy source.

An eccentric playboy's astounding natural history collection.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

The only home that Alexander Hamilton ever owned has a history almost as troubled as his own.

Hiroshima survivor on Riverside Drive.

Known simply as "The Hand," this famous public sculpture in Berlin was featured in a Depeche Mode music video.