Once the largest windmill outside of Holland, with enormous 114 foot sails.

A famous alternative culture epicenter and where Joplin serenaded young hippies.

A historic hotel that made a cameo in Hitchcock's classic film has no intention of letting guests forget its fame.

This private residence was the template for one of the most beloved television homes of all time.

Golden Gate Park's historic collection of plants.

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

San Franciscans leave gifts and messages for the magical beings that live behind the tiny, mysterious door installed on a tree in Golden Gate Park.

Legendary prop shop filled with one man's collection of scientific curiosities.

Step into a pastel time capsule where candy is truly dandy.

Old neon signs from the City of Brotherly Love provide a snapshot of the city’s evolution.

The abandoned coal loading dock is a canvas for unsanctioned art.

Enjoy a slice while browsing the world's largest collection of pizza memorabilia.

The oldest surviving botanic garden in the United States.

The Vermont grave of a 4,000-year-old mummy prince.

A 60-foot-tall tower provides unparalleled views of the southern Green Mountains.

The last of Philadelphia's wood-paved streets is now a landmark of terrible engineering.

A curious building honoring past and current members of a historic musical comedy troupe.

A layered tribute to the work of mosaicist Isaiah Zagar.

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

The final resting place of one of the United States's greatest poets.

The oldest active church in Pennsylvania is also the second oldest Swedish Church in the United States.

One of the oldest of its kind.

A museum dedicated to the strange and extravagant costumes and memorabilia of the mummers, a tradition older than Philadelphia itself.

This weird abode has inspired everything from the "House On Haunted Hil" to a robot hunter's pad.