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

A hidden garden of stones engraved with scriptures, a Joseph Smith Sphinx, all carved by one man.

See wolves, coyotes, and arctic foxes in a natural environment smack in the middle of New York State.

America's oldest drive-in movie theater has been in continuous operation since 1934.

A farm in New Jersey grew a most unusual crop for AT&T's testing purposes.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

A walkable map of the world, made from soil and stone by one man.

The most alien-looking place on Earth.

Tens of thousands of rocks make up what is thought to be a giant star calendar.

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

This 1830s store is believed to be the site of Harriet Tubman's first stand.

A beautiful Victorian statue shows France's enduring love of the rhinoceros.

The site where two doves fell in love.

A glittering Thai Buddhist temple in suburban Pennsylvania.

This hidden gem of a garden has one of the only surviving Victorian ferneries in America.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

This Philly landmark has a giant butterfly pavilion, three floors of insect displays, and withstood a $40,000 heist.

Erected in 1697 this Philadelphia bridge is the oldest surviving roadway bridge and perhaps the oldest stone bridge in the United States.

Frank Lloyd Wright built this suburban synagogue late in life, but it stands among his most iconic masterpieces.

A girls' boarding school inspired by the Chicago World's Fair, once abandoned, now restored to strange and scenic glory.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.