When the water level in the Danube in central Budapest is low enough, there is a secret site telling the history of one of the most iconic bridges of the city.

A turn-of-the-century agricultural architecture movement turned out to be a fad that caught on the strongest near Rochester, Indiana.

Stone monument honoring a town founder has a witch-boot shaped stain and a curse to go with it.

This 19th century granite fortification is one of the most well preserved forts in New England.

The first bridge observation tower in the U.S. offers one of the best views of Maine.

One of the country's best automotive museums and home to one of the first motor vehicles.

Some museums preserve beautiful things; this museum preserves hard work.

Yorktown’s grandest colonial home still wears the scars of the siege that helped end the American Revolution.

A striking, menacing sandstone peak towering above a landscape that's equal parts Mordor and the Moon.

Rummage through this sunken ship, but leave your scuba gear at home.

Deliberately hidden for centuries, the magnificent Saadian Tombs were eventually uncovered in 1917.

One of the two original gateways into the Kasbah, this gateway is a nesting site for storks.

One of the tallest waterfalls in Africa is also home to a population of monkeys who enjoy the waters and the occasional guest.

Traditional 11th-century outdoor tannery.

The other side is actually green.

Mosaics, storks, and brothels—this ancient city has it all.

The facade of this 16th-century building is decorated with carvings of 300 seashells.

The Cathedral of Salamanca has a number of unusual carvings but none so surprising as a modern astronaut.

This historic streetcar system has been running since the 19th-century.

Elaborate tile work in this railway station tells the story of Portugal.

Gustave Eiffel's masterpiece until the Eiffel Tower was built.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

One of Ohio's longest history books isn't made of paper—it's painted across the floodwall.

This ancient village provides insight into the complexity of the pre-Columbian Fremont Culture.