A restored 1920s cascade stairway provides one of the best views of Oakland's Lake Merritt.

One of the most elaborate displays of Jellyfish is on display at the aquarium.

The headquarters of a secretive order is also a beautifully-designed park.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

World War II-era Nazi compound nestled in the Santa Monica hills.

This centerpiece of the Hollywood & Highland shopping center is a recreation of a long-lost movie set.

This symbol of peace is appropriately positioned overlooking the Pacific Ocean.

The site of a classic series of Laurel and Hardy pratfalls.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

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

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.

This geometric feat is a testament to the Incas' mesmerizing architectural abilities.

A fascinating little museum all about the rich history of Peru’s famous plant.

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

This archeological site hidden behind Teotihuacán's pyramids shelters 1600-year-old murals.

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

The oldest stone house in Paris was built by its most famous alchemist.

France's most famous cemetery, with some of its most curious tombs.

The bronzed skull of a beheaded traitor was affixed to the city gate in the 17th century.

Iconic red and white plaques show the creative names invented to navigate the city streets.

The mountaintop wind turbine boasts a viewing deck — and a fair share of controversy.

The colorful, smiling concrete silos of Vancouver.