Remains of Roman amphitheater hidden in a sleepy quarter of Paris.

A deadly ancient portal to the underworld.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

Over 60 species of birds inhabit this colorful aviary park in South Africa.

Spanning over 10,000 square miles, this ancient salt pan is one of the largest on the planet.

There is only one place in the world where the corners of four nations come together.

Combing through this David Livingstone tribute will escort you on adventures through the looking glass.

Get tall with nature's lankiest beasts and their warthog friends at this Kenyan preserve.

Standing atop 2nd-century Roman ruins, this church is one of the oldest and most iconic in Old Cairo.

The world's largest anatomically accurate brain sculpture.

This Maine bridge may be the last wire-supported bridge of its type in the world.

The world's longest covered bridge is a quaint and incredible wooden tunnel.

Inside the simple black-and-white exterior of Église Sainte-Cécile hides a pastel wonderland.

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

A contemporary fresco movement illustrates the region's rich history.

This former prison now houses a lovely library devoted to Quebec's oft-maligned English-speaking history.

A former church transformed into a public library.

The former site of the world's largest paper mill is now a museum preserving the heritage of Canada's pulp and paper industries.

City law dictates that this mountaintop cathedral containing the heart of a saint is to remain the tallest building in town.

The wreckage still sits at the exact spot the plane crash-landed in 1945, carrying 1,000 pounds of explosives.

Giant cauldrons overflow with Uzbekistan's favorite rice dish at this cavernous dining hall.

Prowl through this sprawling bazaar under a massive Soviet-era dome for delicious eats.

This retro, UFO-like structure is a remnant of the Soviet-era circus.

This mysterious complex of abandoned yurts and fading murals was meant to be a center of science and spirituality in Kyrgyzstan.