The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

World's largest crossword puzzle spans the side of a towerblock, its clues scattered throughout the city.

The deepest metro station in the world.

The headquarters of the prestigious World Food Prize celebrates the heroes in the fight against hunger, has no cafeteria.

A pop-culture attraction outside of Dyersville, Iowa, hits a home run.

Home with Gothic windows featured in a famous painting.

This zombie-themed restaurant stands out in the heart of corn country.

Millions of dollars worth of sculpture decorate this Iowa city center.

17,400 lbs., 12 feet in diameter, and 29 years in the making.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

143 feet of leaping muskie whose mouth can be used as a wedding venue.

Home to the Amorphophallus titanum "Corpse Flower," which is among the largest flowers in the world and also smells powerfully of rotting flesh when in bloom.

The only arched bridge made of stone on the entire Mississippi River.

Hub of Scandinavian culture in a Minneapolis deli.

Half of a waterfall goes into the river while the other half seems to disappear.

A toweringly silly piece of modern art has been delighting locals since the 1980s.

This posh mansion began as a family's estate and ended as the site of a murder ripped from the pages of a pulp novel.

This rare vessel mixed luxury with labor before being converted to a museum and sometimes haunted maze.

This picturesque cliffside beacon no longer calls to sailors but shines once a year in honor of a famous shipwreck.

A museum dedicated to a secret military hospital hidden beneath a castle in Budapest.

Uh, pardon me, ma'am, but I couldn't help noticing that there's a Columbo statue in the middle of Budapest.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

After the famous composer died in Paris, his sister snuck his heart out of the country to honor his wish that it be buried in their native country.

One of the largest museums in Ukraine remembers the story of the German-Soviet War in iconic, brutalist style.