Austin’s local mountain isn’t really a mountain at all.

The world's longest known cave system.

A spiritual vortex among the red rocks in Sedona.

Rat sculptures try to infiltrate the Graybar Building in an architectural tribute to New York City's nautical history.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

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

This subterranean oyster house has been the pearl of Grand Central Station since 1913.

A very classy 1920s-era bar right in Grand Central Station.

The most confusing clock in New York.

The only subway station in the city that still makes use of gap fillers.

Mysterious 500-year-old tapestries depict a unicorn hunt.

The first pet cemetery in the United States.

Chewing gum tycoon's memorial lies perched over wife's botanical gardens on Santa Catalina Island.

An Italian restaurant became a rock-and-roll hangout and the lair of the "Hollywood vampires."

This sculpture presents commentary on a life in pursuit of profits.

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

Her final resting place was intended to be modest and private, but the power of her popularity continues to draw visitors.

America's most famous piece of self-built architecture.

Once strictly off-limits, this lower level housing curious and priceless vehicles of the Petersen Automotive Museum is now open to the public.

Scores of vintage street lamps shine along L.A.’s Miracle Mile.

First LEED-certified gas station in the United States.

A multimedia experience that chronicles the atrocities of racism.

The final resting place of a space program monolith.

After starting as a whimsical tourist attraction that eventually found its way to ruin, these renovated canals offer a lush and exotic locale on the Pacific Coast.