This frequently-photographed waterfall takes only a short hike to visit.

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

Take a drunken tour inside the world's largest known geode.

A castle that was built stone by stone by an eccentric journalist.

Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

A pair of slides and a tree-lined stair corridor have been an urban oasis for nearly 40 years.

Where beautiful signs live on forever.

A hands-on traveling collection of the innovative devices of yesteryear.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

Odd outsider art installations surround a Gold Rush-era ghost town.

This modern antique shop is a museum for 1980's Saturday morning cartoon culture.

Towering basalt columns, a creation of fire and ice.

A dilapidated dock tells the story of Titanic's missed arrival.

Order scoops of pandan, lychee, and black sesame at this family-run institution.

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

A beautiful geyser under environmental threat.

The ghostly remains of an accidental sea.

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

A hand-built folk art installation covered with messages of God's love.

This abandoned amusement park was built on a site with a dark history.

The first declared National Monument in the United States.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

A beautiful 62-acre Catholic shrine and botanical garden.