The bridge continues the legacy of President Franklin D. Roosevelt's New Deal policy.

The "world’s largest honky-tonk" also has its own indoor rodeo arena.

Morocco's Argania trees are infested with nut-hungry goats.

One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

This mesmerizing architectural wonder will take your breath away with its unusual color patterns.

Known as the most scenic route in Sri Lanka, this train line is steeped in history and offers an unparalleled view of the country.

An exclusive waiting room built for the royal family in the 1920s is hidden in Milan’s central station.

In the Middle Ages, villagers would sound this stone trumpet to boost fertility and coax fish to shore.

The ominously named cave is home to some remarkable ancient art.

Look closely and you’ll notice that the color changes a third of the way up the tower.

Despite a recent paint job, the factory still sits empty.

This volcano rises like a giant anthill from the plains below, with a road spiraling up to the rim.

This quirky hot springs town known to locals as "T or C" was named after a radio show.

This fast-food outlet is the only space and UFO-themed McDonalds in the world.

Crafted in 1911, this steam locomotive spent its entire working life in Flagstaff.

After a short-lived attempt to bring America in line with the rest of the world, this road was left in metric.

Its collection is a sweet reminder of the shuttered factory.

This strategically-placed fountain creates the magnificent illusion of mustangs galloping across a river.

The saga of the massive nut begins and ends in Texas.

This unique religious structure is an architectural gem with arresting ocean views.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

It houses the remains of a 17th-century version of the Titanic.

An abstract monument to a symphonic composer.

The Guardian of Tallinn.