A man-made island in scenic San Francisco Bay.

A speck of nature and art in one of San Francisco’s most notorious neighborhoods.

The stones that traveled from Spain to eventually become a holy place for San Francisco's nature worshippers.

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

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

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

The original vault that held the president's remains still stands, empty, not far from where he was finally buried.

When you visit his grave, be sure to rub the Great Emancipator's nose for good luck.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

Ancient paintings known as the "Sistine Chapel of Cave Art."

19th century pendulum and a clock restored by a rogue group of guerilla artists.

Built on the remains of one the Incas’ most important gathering spots, this square keeps the spirit of a fallen empire alive.

An Inca spa, military outpost or maybe… both?

Situated on a sacred Inca site, this 16th-century cathedral took nearly 100 years to build.

A mysterious pre-Incan ruin believed to have miraculous healing powers.

Did Inca children also slide down these smooth rocky slopes above Cusco?

Huge stone depressions which may have acted as an Incan agricultural experiment.

One of the world's tallest waterfalls wasn't revealed to the world at large until 2006.

If you’ve ever seen a picture of Machu Picchu, then you’ve seen a picture of Huayna Picchu—you just didn’t realize it.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

The former Naval shipyard is open for exploring - mostly.

The oldest Naval cemetery on the West Coast.

Austin’s local mountain isn’t really a mountain at all.

A high-octane shrine to the greatest Texans who ever lived.