The most famous location in China was home to whole dynasties worth of imperial rulers.

The only thing still moving in this town is the eponymous hot spring.

A man-made island in scenic San Francisco Bay.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

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

San Francisco's first World's Fair, dedicated to the wonders of California.

An elaborate gift from Claus Spreckels is now a piece of San Francisco history.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

Depicting scenes of everyday life - and specific individuals - in Great Depression era San Francisco.

Once the largest windmill outside of Holland, with enormous 114 foot sails.

The key to turning shifting dunes into the green oasis of Golden Gate Park.

Where the first "expert riders, willing to risk death daily" for the Pony Express were recruited.

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

Pillars made of 700 pieces of luggage climb to the ceiling of Sacramento Airport's baggage claim.

This historic Victorian hotel has a scandalous history of affairs and murder.

A famous hotel houses an impression collection of mini dioramas and giant doll houses.

The celebrated eyesore created by starry-eyed sweethearts.

At this cozy bar tucked down a hidden Galway backroad, Guinness makes the Gaelic come out.

Originally built to monitor fishing, this Victorian tower now educates visitors about the local salmon industry.

Certain traditions prevail on the least-visited island of the Aran Islands.

Original factory of John G. Borden who started what we know today known as Borden Dairy.

Images chiseled into the basalt here date back an estimated 300 years.

Take shelter from Hawai'i's tropical heat under the massive canopy of largest Banyan tree on the island.

This blowhole is supposedly caused by a trapped monster.