In the power of this waterfall, Alexander Hamilton saw the potential for industry.

The oldest house in Manhattan is now a museum that remembers the home's sordid history of scandals, vice-presidents, and ghosts.

This castle-like building in Manhattan helped destigmatize cancer in the 19th century.

This small New York museum celebrates the mountainous artwork of a Russian mystic.

Beautiful mosaics cover the first stations opened on New York City's newest subway line.

This hidden library of physiological ephemera contains centuries worth of knowledge on the vim and viscera of the human body.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

Time travel with sweets across history at this research-based candy store.

This advertisement for talcum powder was painted on the rock face and has since defied removal.

North America’s largest collection of horological devices and home to a colossal clock with a dizzying array of features.

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

This beloved Baltimore spot features caged dolls, a giant Pez collection, and many, many mannequins.

This English-inspired Maryland garden is home to acres of opulent plant life including bushes shaped into an entire fox hunt.

Every autumn, this hillside is ablaze with red summer cypress.

The world's largest drain sits below the city of Kasukabe, Japan.

Every color in the rainbow awaits.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

Stretching for 22 miles, the world's longest tree-lined avenue dates back to the early 17th-century.

This subterranean spot might be the epitome of Japan's baroque, retro coffee houses.

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.