A man-made island in scenic San Francisco Bay.

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

Concrete strongholds stand guard over the Golden Gate.

This controversial depiction of the "Founder of California" looks as though it was sculpted from mashed potatoes.

Once close to extinction, there is no shortage of elephant seals on the beaches of Año Nuevo State Park.

The tragedy of the Japanese internment camps is remembered here by a stark "Soul Consoling Tower."

A charming desert roadside bakery that produces 10 times more bread daily than it has residents in its town.

The interior of the Overlook Hotel in "The Shining" was based on this Yosemite original.

A 90-acre park on former landfill that hosts an annual kite festival.

An amazing collection of fantastic reptiles, amphibians, spiders, and insects.

A gothic palace of endless stalagmites and pseudoscorpions waits within one of the world's most beautiful caves.

A celebrity from the late Cretaceous period.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

Five sultans and their families rest in eternal splendor, teeming with overlooked beauty and drama.

An island in the middle of a lake, in the middle of a volcano, in the middle of a bigger lake, in the middle of a bigger island, in an archipelago, in the Pacific Ocean.

Holy Hindu shrine in an enormous, monkey-filled limestone cavern.

Singapore's landscaping project is home to 18 incredible Supertrees.

This $62 million dollar temple was erected to house one little dental fragment of religious history.

Postal archives over 150 years old offer a window into Singapore's culture and tradition.

This Armenian monastery was carved out of cliffs and named after the spear used to stab Jesus.

A geological oddity topped with a 2,000-year-old pagan temple.

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

A contemporary fresco movement illustrates the region's rich history.