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

More gold than anywhere else, ever.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

Olfactory delights in San Francisco's Botanical Gardens.

James Turrell's total color immersion art installation, hidden on the top floor of a luxury handbag shop.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

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

New York City's smallest piece of private property.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

Home to items never before seen by the public.

A beautiful geyser under environmental threat.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

This lower Manhattan bar is set up in an old bank vault that rests beneath a skyscraper that hides even more historic splendor.

This shop for all your super spy needs hides an educational secret.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

A "gravitational anomaly" located in the redwood forests just outside of Santa Cruz, California.

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

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

One man's homage to the sun continues to grow like a glass fractal.

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