An old trolley bridge was converted into a breathtaking garden bursting with colorful flowers.

Once the most densely populated place in the world, this island is now a ghost town.

Furniture tries to escape an abandoned building in San Francisco.

A walk through the historic city center, under the streets of Seattle.

Creaky dinosaurs grow in the backroads of Monmouth County, New Jersey.

Remember that scene in the Matrix, when Neo is in the big white room with all the weapons flying by? Well, this is what it would look like if he had wanted trees instead of guns.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

The dome-shaped reservoir of this old water tower produces unique acoustic effects.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

Chewing gum tycoon's memorial lies perched over wife's botanical gardens on Santa Catalina Island.

Dynastic Home of the De Piro Family.

A curious fountain that has no water and includes Satan, a crab, and 9 giraffes.

A toxic ghost town sitting atop a massive coal fire.

An astounding collection of medical specimens, including bits of President Lincoln.

An experimental, automotive replica of Stonehenge.

Impossibly life-like natural history models created out of glass by a father and son.

A museum devoted entirely to the rattlesnakes and snake-related art.

A towering spire in the fortress of Kalemegdan honors the victorious armies of Serbia during their struggles against the Ottoman Empire.

Breathtakingly blue walls shimmer inside the "Glacier Behind the Town."