The real faces of Venice beach captured on Romanesque columns.

The L.A. Zoo has a secret garden of rare bootleg cycads, a palm specimen dating back 280 million years.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful geyser under environmental threat.

The world's longest known cave system.

This head-spinningly bizarre Depression-era art cave is wall-to-wall quartz and Jesus.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

Enormous lake at the bottom of a unique cave system.

Buenos Aires' city of the dead contains some very famous remains, including Eva Perón.

A series of waterfalls so massive they straddle the border of Argentina and Brazil.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

The deepest sinkhole in Central Europe comes with a grisly tale and an unusual nickname: “The Stepmother Abyss.”

A saintly relic hidden in a Prague church basement.

Two stunning 17th-century libraries and a cabinet of curiosities.

Macabre astrological automaton clock dating to the late 1400s.

A neo-Gothic church built to thank God for saving the Emperor of Austria from an assassination.

An exquisite Baroque church in Vienna's old town.

The solemn exterior conceals an opulent interior of this 17th century church.

This skeleton-filled altar piece served as a backdrop to one of the most iconic scenes in "The Sound of Music."

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

The world's oldest known salt mine.