Reason for Michigan's potential diamond mine.

A science teacher's dream.

A magical sinkhole on the Yucatán Peninsula is adorned with mini waterfalls and hanging vines.

A shrine to a skeleton saint in the city of angels.

A still functioning vaudeville carousel that has operated for over a century boasts a colorful menagerie and past.

This hands-on math museum believes in turning concepts into constructs.

Spiral labyrinth hidden in the hills above Oakland, CA.

The fossilized remains of ancient California redwoods.

An optical illusion found amid a logged redwood forest.

A bigger-than-life pun that has become a beacon of altruism.

A popular tourist cave with a dark past.

This naturally heated mountainous creek has created a group of neon blue pools of potentially deadly boiling water.

Rodin's famous depiction of Dante's 'Inferno', amidst a sculpture garden of many of his other works.

Neither Spanish settlers nor anyone since has been able to tell who built these strange California rock walls.

One of the most unusual geological features, recognizable from a dozen hit movies.

Nestled in the heart of San Francisco’s bustling Financial District stands a unique homage to the Mayan and Beaux Arts.

Where the leftovers of love affairs can live on forever.

A whimsical antique shop with a strong air of mystery, filled with items from ages, and what feels like worlds, past.

A modern mechanical planetary system, part of a 10,000 year clock.

Travelers exchange letters with woodland creatures at this mini post office.

One of the ghostly stops along Route 66.

Hundreds of trees made from glass bottles make up this forest on Route 66.

A ruined hotel with an unlucky history and an eerie present.

The largest drain hole in the world.