For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.

A lush indoor jungle fills this bustling Madrid transportation hub.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

An ancient Egyptian temple in the middle of Madrid, Spain.

A middle school sports field that many believe was the true location of the first successful powered flight - and not by the Wright Brothers.

A fine mixture of the old and the new topped with an art deco neon spire.

The Empire Mine is "one of the oldest, largest, deepest, longest and richest gold mines in California."

The ruins of the castle that chemicals built.

Golden Gate Park's historic collection of plants.

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

This private residence was the template for one of the most beloved television homes of all time.

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.

This Big Sur waterfall drops 80 feet directly into the Pacific Ocean, and inspired the hillside house up top.

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

Stripes of flowers bloom each spring in a 50 acre rainbow of color.

Each year these high desert hills are absolutely covered with poppy flowers in a surreal show of nature.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

San Francisco's newly reopened hands-on science museum.

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

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

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

Artifacts and memories from the Vietnam war, located in a place that experienced it first hand.

Witnesses claim the Virgin Mary statue outside the church once mysteriously shed a single tear.

This French colonial post office is arguably the grandest in all of Southeast Asia.