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

There is no trying to fall in love with this Star Wars fountain, you just do or do not.

A 140-year-old castle with underground caves hidden in San Francisco.

A graceful natural rock formation stands astride the point where the Gulf of California meets the Pacific Ocean.

This beautifully deceptive waterfall is something far different from what it appears to be.

High atop a Mexican rainforest mountain, this ancient pyramid once drew pilgrims countries away.

These azure waters were thought to lead to the Mayan Underworld.

A gargantuan crystal kingdom.

The largest cave shaft in the world is home to thousands of birds and popular with BASE jumpers.

A lovers' beach, tucked below the surface of the island, provides a safe haven for romance.

Built 1,500 years ago, this abandoned Mesoamerican city is surrounded by a natural wall made of outstanding rock formations.

A neo-Gothic temple in central Mexico featuring a labyrinthine network of crypts.

During its heyday, the massive estate boasted its own railroad station and post office.

Legend has it thieves once stashed their treasures in this crater in the Mexican desert.

A dark tunnel leads to a striking white crater that seems to be from another planet.

The meteor that sealed the fate of the dinosaurs landed at this site, one of the largest impact craters in the world.

Canyon walls shrouded in ferns.

Trails through lava-carved tube-caves display sparkling bacteria and a rich history.

A popular tourist cave with a dark past.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

This naturally heated mountainous creek has created a group of neon blue pools of potentially deadly boiling water.

Eons old volcanic activity created one of the most stunning rock formations in the United States.

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

Abortion, prohibition, religion, war, and fear all play a part in the history of this idiosyncratic Pacifica castle.