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

A huge musical instrument played by the ocean.

Golden Gate Park's historic collection of plants.

Special tunnels built so that frogs won't be killed when crossing the highway.

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

Every autumn, this hillside is ablaze with red summer cypress.

A museum befitting the city responsible for supplying the majority of the world's LSD.

A still functioning vaudeville carousel that has operated for over a century boasts a colorful menagerie and past.

A fiery crater has been burning in the Karakum Desert since 1971.

The world's toughest modern Christian pilgrimage leads directly to the gates of Hell.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

A lovers' beach, tucked below the surface of the island, provides a safe haven for romance.

A historic observatory precariously perched at the "Top of Europe."

Millions of glowing microscopic organisms light up the waters of this luminous lagoon.

Crypt mausoleum in cathedral's basement contains relics of third century Roman martyr, Saint Vibiana.

Egyptian treasure trove of fossils documenting the whale's transition from land mammal to sea creature.

An ethereal glowing blue ocean cave in Croatia.

A storybook European village in Berkeley.

A private home built to resemble the shape of a microscopic creature.

A celebration of once forgotten materials.

An endless sea of white conical domes.

In Egypt's expanding metro area, many of the neighbors are dead.

Underground farm located in a former bank vault deep within the bowels of Tokyo's business district.

An underwater city for the dead.