Old ships and machinery fill a historic harbor in the city that's home to Europe's largest port.

A beautiful maze marks where three countries meet.

This limestone cave offers an incredible view of the Río Grande de Arecibo valley.

This colorful gate stands as an entrance to the walled city of Old San Juan.

A magnificent waterfall nestled in the heart of the El Yunque National Forest.

The world's brightest bioluminescent bay.

This statue of the great Argentinian car driver is located near a famous curve of the Monaco Grand Prix.

Sky ships, planes, and portraits left as unique tokens of hope and thankfulness.

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.

Site of a classic 19th-century physics experiment to prove the earth is rotating.

Paris' linguistic guide to the international language of, yes, love.

The largest salt lake in the Sahara is mysteriously alluring.

An abandoned film set location for a remote spaceport in a galaxy far, far away hides in the Tunisian desert.

The largest and best-preserved Roman amphitheater in Africa was designed to seat 35,000 people.

The original movie set for the home of 'Star Wars' hero Luke Skywalker.

Buildings from the fictional planet of Tatooine still litter the Tunisian desert.

The ancient heart of Tunis is an enormous maze of narrow streets and alleyways.

An ancient burial ground believed to have been used for ritual sacrifice.

This museum in the famously blue neighborhood of Sidi Bou Saïd showcases a traditional Tunisian lifestyle.

A seemingly simple canyon that was the backdrop to a number of famous movies.

The original film set of Luke Skywalker's Tatooine home from the 'Star Wars' trilogy.

Some believe this abandoned Brutalist masterpiece inspired George Lucas's Sandcrawler.

A 15th-century granary that played the role of futuristic slave quarters in the world of 'Star Wars.'

Sections of the iconic limestone columns have been left uncleaned as a reminder of the city's polluted past.