A gateway to a mysterious network of underground tunnels.

Beautiful tiles decorate many of the town's surfaces and stand testimony to its glorious artistic history.

A bright little alley in La Boca is a part of tango history.

Eclectic collection of rare and beautiful stones in a historic home.

100-windowed castle turned art gallery, built by one dedicated mason.

Thousands of flamingos and other bird species flourish in these Camargue wetlands.

The massive white mound and accompanying water terraces are a striking geological oddity.

The saltiest lake in all of Crimea is also the pinkest of the pink and teeming with life.

Bacteria and algae give the salty water its bubblegum hue.

This salt marsh in Southern France is as pink as the flamingos that inhabit it.

The place where houses are born.

Most complete collection of Gymnosperms in the world.

The 40-foot-tall votive candle is the largest of its kind.

The half-mile long structure is so impressive, it even shows up on satellite images.

Malibu's first beach home features an astonishing trove of ceramic tiles.

The dramatic upward-curving roof is one of the most iconic examples of Googie architecture that still stands today.

This stunning concert hall has become a symbol of Iceland's national recovery.

An 18th-century Catholic church converted into an eccentric temple of music and bacchanalia.

Long hidden under grime, the politically radical murals of a little known Yugoslavian master are finally getting their due.

A medieval fountain lined with 99 unique stone faces whose origins and meaning remain unknown.

About 80% of all U.S. avocados are descendants of Rudolph Hass's glorious tree.

You feel like you're in a forest, but you're actually walking amidst the branches and trunks of a single giant tree.

The cursed island of black pebbles.

A phallic shrine to a princess goddess in Krabi, Thailand.