Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

Built hundreds of years ago this downtown iron barrier once protected a much despised king.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

The world's largest man-made underground caverns offer unparalleled underwater wonders.

Quite simply the largest tree in the world (by volume).

The oldest continuously operating church in California.

Where a railroad loops under or over itself to rise or drop more than 70 feet in a short distance.

A popular winter vacation destination for migrating monarch butterflies.

In the country around Buttonwillow, California, a marker commemorates a revealing moment in the story of a water colony from the fictional Kcymaerxthaere that sought independence.

Honoring the famed folktale author, this California museum looks like it belongs in the Black Forest.

With its peeling paint and faded sign, this theater-turned-recycling plant is a nostalgic relic of 1950s Americana.

The unbelievably opulent home built for an infamous newspaperman.

Coastal dunes, site of buried Egyptian movie set and former utopian colony.

A deserted hodgepodge of experimental structures designed by nearby university students.

A simple statue outside a California Amtrak station honors the overlooked contributions of the "silent spikes."

A chain of bells connect the California Missions and honor the legend of the "King’s Highway."

An alley covered with 20 years of bubble gum.