A stately palace has been converted into the world's largest cannabis museum.

Week-long block party becomes a competition for the best decorated street.

Ring the bell to enter a bar that looks equal parts museum and old curiosity shop.

A slice of central Asia in the middle of Berlin.

Prehistoric history as seen through the lens of an outsider artist.

17,400 lbs., 12 feet in diameter, and 29 years in the making.

New York City's smallest piece of private property.

This little museum is built on a theater that was once a wildly elaborate speakeasy.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

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.

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

Oldest surviving example of a Dutch saltbox frame house in America.

“Wagon Jobber" turned smokehouse magnate's family-owned business is still going strong 100 years later.

Brooklyn's Barkaloo Cemetery is the resting place of a scant two bodies.

The Underground Railroad passed right through this historic Brooklyn Heights church.

A working metal shop and venue for outrageous art and music shows in a former cannonball factory.

19th century cemetery hidden in Brooklyn's Prospect Park.

Leaf through over 30,000 artists' sketchbooks in what may be the world's largest collection of doodles

This hidden workshop is filled with molds of France's most iconic sculptures.

Original cabaret handbills, posters, and feline artwork are a purrfect highlight of the Museum of Montmartre.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

A subterranean shelter remains intact under a busy Paris railway station.

This museum in a Paris apartment gives a unique look at the iconic French singer's life.