This Quebec estate is home to the elaborate gardens of a self-taught horticulturist.

This iconic science fiction house still looks like something from the future.

This ultra-modern home clings to the slope of the Hollywood Hills on a precarious stilt.

A common entry point to the Griffith Observatory trail holds its own wonders.

This weird abode has inspired everything from the "House On Haunted Hil" to a robot hunter's pad.

The 10-foot-wide Long Beach home was built on a dare.

An eatery in a shallow river where diners can enjoy their meal mere feet from the base of an artificial waterfall.

This contemporary art museum is filled with other, smaller museums, which feature work from artists primarily in the Pacific Northwest.

The hidden offices underneath Memorial Bridge have been locked up since 1976.

Nothing says indulgence like a 1,500-pound chocolate castle.

At this ancient settlement at the foot of Mount Babadağ, honeycomb tombs are carved into a round cliff.

While you wait to cross the street at a traffic light in Mainz, you might notice that the light is staring back at you.

This large cave is a summer home to thousands of bats and has a rich history dating back to prehistoric times.

This funicular railway rumbles along for a mile up the nearly vertical face of Chattanooga’s Lookout Mountain.

Wild lights and sound effects turn a walk through some caves into an eye-popping 1960s tourist attraction.

Enormous lake at the bottom of a unique cave system.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

This massive sycamore tree has been labeled as one of the largest in the state.

This recreation of a 19th-century dime museum is full of oddities.

Follow the steps, and this roadside artwork will teach you how to dance.

This historic train station has been converted to a locomotive themed hotel.

More than five miles of underground passageways.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

Time travel with sweets across history at this research-based candy store.