A grove of "candelabra redwoods" deep in California's Lost Coast.

A raised boardwalk winds through a thicket of stunted, century-old trees no more than nine feet tall.

The southernmost outpost of the Russian Empire in colonial America.

The California capital city once stood 10 feet lower than it does today.

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

San Francisco's oldest operating hotel, with a Victorian atmosphere and a "haunted" fourth floor.

The oldest burial ground in the city, final resting place of city founders, Ohlone natives and murderers alike.

A favorite haunt of dinosaur loving children and hallucinogen loving hippies alike.

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

A huge musical instrument played by the ocean.

A trash dump made beautiful by nature's power.

Skulls from the plague of 1656 and World War II bombings are united by a cult dedicated to caring for the ancient dead.

Go inside to really appreciate this 500-year-old technological masterpiece.

Over 50 exquisite hand-painted Renaissance maps decorate a Medici storage room.

This domed temple was built in a hidden cave mouth as a refuge for sinners seeking absolution.

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

This centuries-old Italian chapel hangs midway down a sheer cliffside.

A fairy tale castle in modern Rome.

Jesus' footprints and the first catacombs in the world.

Architectural monsters are devouring this palace's every door and window.

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

As can be expected from a centuries old church built in a canal city, the undercroft of this house of worship is beautifully flooded.

Venice's "Island of the Mad."

The final resting place of the poets Shelley and Keats.