This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

One of the now-less-hidden floral gems of the "Emerald Necklace."

One of the last remaining World War II Victory Gardens in the U.S. is quietly growing across from Fenway Park.

The site of Paul Revere's historic two lantern warning.

Hiding amid the largest camellia collection in the country lies a charming children's maze, donated by a secret admirer.

The key to turning shifting dunes into the green oasis of Golden Gate Park.

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

A winding path built in secret on the edge of the continent.

An artsy hidden staircase leads to breathtaking views of San Francisco.

A monumental cross hides in the trees in Golden Gate Park.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

Golden Gate Park's historic collection of plants.

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

An overlooked and unassuming engineering marvel.

San Francisco's newly reopened hands-on science museum.

The once-abandoned 140-year-old hotel used in the movie "In Dreams."

A museum dedicated to "science, history and the arts" little changed since 1915.

The 100-year-old public collection of a New Hampshire dentist that contains taxidermy, Native American artifacts, and a pair of mummy hands.

Birthplace of America's first documented serial killer.

The massive Roman arch in New Hampshire that was meant to be a tomb.

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.

The home, museum, and death site of Kodak's influential founder.

An Escher-inspired library dedicated to the wonders of the human mind, yet closed to the public.

Mysterious 500-year-old tapestries depict a unicorn hunt.