The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

An artsy hidden staircase leads to breathtaking views of San Francisco.

Golden Gate Park's historic collection of plants.

A century and a half of research in the sciences and natural history, still going strong.

An elaborate gift from Claus Spreckels is now a piece of San Francisco history.

Its original statue was deemed so ugly, locals called it “Scary Lucy.”

The first and only American institution dedicated to the enduring value of comedy in the United States.

Once adorning a New York skyscraper, these reclaimed ruins now haunt an Indiana park.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

One of two giant blue cockerel statues erected with an intentional double meaning.

California's own medieval Italian castle, authentic down to the 300-year-old iron maiden in the dungeon.

The southernmost outpost of the Russian Empire in colonial America.

This whimsical seashell-shaped place of worship was designed to blend into its surroundings.

The mysterious round rocks of Schooner Gulch.

Massive prehistoric mammals used these stones as oversized scratching posts.

The lighthouse central to the 1980s horror classic "The Fog" is, in fact, located in one of the foggiest areas of the Pacific Coast.

A colorful square marks the heart of the city's LGBTQ community.

A massive ultra-modern church presents a science-fiction view of Catholicism's inclusive future.

Once the largest windmill outside of Holland, with enormous 114 foot sails.

The giant pair of sexy legs sticking out the window of this costume store have become its main draw.

The drama of nature in full effect in this Nevada State Park.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

Everything you always wanted to know about borates is here.

These colossal desert barcodes have been fine-tuning spy satellites for decades.