The charmingly disheveled clock tower of Tbilisi's puppet theater.

A surreal statue honoring Prague's favorite literary son.

Macabre astrological automaton clock dating to the late 1400s.

Amsterdam's Red Light District leaves little to the imagination.

A public urinal so pretty, it was declared a national monument.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

A beautifully eclectic mix of architectural styles.

The world's longest outdoor covered escalator system transports commuters through Hong Kong's hilly terrain.

This hulking behemoth is actually five interconnected towers built in the 1960s.

Remnants of the most densely packed city in world history, that thrived on anarchy for 30 years.

One of the most spectacular canyons in the world.

This massive monument towers over the city as a constant reminder of the lives lost during Algeria's hard-won war for independence.

Beach instrument turned bed and breakfast.

This French colonial post office is arguably the grandest in all of Southeast Asia.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

Iconic red and white plaques show the creative names invented to navigate the city streets.

An Orthodox church built by the Royal Family for the Russian community exiled to the French Riviera.

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

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Every equinox this Maya pyramid puts on a spooky ancient light show.

Tijuana's legendary jai alai or "basque ball" palace is now a massive music venue.

A market for witches is hidden within a train station.

This historic Chilean cemetery is the burial place of hundreds of European and American freethinkers and non-Catholics.

Pivotal home of Nobel Prize winner Pablo Neruda.