Semaphore saints, a golden dragon's head, and a stone carved with religious warnings all call this cathedral home.

A secluded fortress from the days of the Crusades that offers breathtaking views.

The most visited, and possibly most controversial, museum in Germany.

In the past, Renaissance sex workers were encouraged to entice customers on this bridge.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

This clifftop arch is a natural stunner.

Deep in the Negev Desert, the world's tallest solar tower looks like a sight straight out of science fiction.

This magnificent castle grew from a small Moorish fortress, and reportedly inspired two iconic Disney castles.

The Dead Sea Scrolls were discovered in the ruins of this ancient monastic community.

This amazing ancient cave was kept secret for seven years to protect it from the public.

Ruins of a German castle on top of a towering stone pillar.

This vertical pinnacle in China was the inspiration for the floating mountains in the movie “Avatar.”

A volcanic old faithful, Stromboli has been erupting continuously for the last 2000 years.

When the rain falls, this drain system turns into a musical instrument.

The most southern point you can drive to in the Western Hemisphere.

The rusty hull of this 1899 ship serves as a tribute to explorers of the bottom of the world.

Every day is like Christmas on this street where the traditional Neapolitan nativity scene comes to life.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

You'll find just about anything in this funky Tbilisi flea market.

Walls of stone rise up from sinkholes caused by underwater erosion.

Geological storytelling.

Cliffside houses provide a spectacular view from their perch above the valley.

Two large eyes painted anonymously on a mountain overlooking the city pay homage to an old legend.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.