2300-year-old Roman road connecting the empire.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

Mysterious 500-year-old tapestries depict a unicorn hunt.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

Elevated freight railway turned wildly successful urban park.

A monument celebrating the idea of reaching inaccessible places.

The world-record holder for the longest bridge stretching continuously over water.

Colombia's biggest botanical garden contains plants from all across the country.

This stone complex marks the urban center of a lost civilization.

This vast masterpiece of Moroccan architecture spreads across 20 acres.

Come for the flowers, stay for the bats!

The 953 windows undoubtedly make this the world's most beautiful screened porch.

More than half of this Indian palace is drowned but it looks all the more spectacular for it.

This opulent 16th-century Maharaja’s palace is a unique mix of Hindu and Muslim designs.

A blooming house of worship for the masses.

Whitewashed mosque contains the world's largest carpet.

The largest falcon hospital in the world, caring for over 6,000 feathered patients every year.

This spectacular mosque houses the second-largest chandelier in the world.

Strolling through these vintage locomotives offers a surprising amount of insight into the history of Kenya.

An awe-inspiring mosque in Morocco with one of the tallest minarets in the world.

Nine limestone rock stacks on Australia's "Shipwreck Coast."

New Zealand's only running funicular railway.

Dolphins, ancient clams and hundreds of waterfalls make this one of the world's top tourist destinations.

A huge communist-era propaganda monument and mural that offers stunning views of the Mongolian capital.