The only presidential monument to display a late POTUS's actual casket.

The angel of death appears to weep black tears at this grave marker.

Medical history museum featuring a lovely doctor's office from the 1800s.

Cleveland's giant "free" stamp is a nod to the Civil War, but was misinterpreted for years.

When you're a great Russian Tsar, even your vomit gets a statue.

Most prolific publishing house in the 1600s open to the public.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Copenhagen's celebrated theme park and gardens.

World's second largest particle accelerator, where nature reveals its secrets.

Arguably the best example of an authentic Dutch windmill in the United States, rivaling its counterparts in the Netherlands.

The modern birthplace of Irish freedom.

The ruins of this medieval castle in Northern Ireland have inspired artists from C.S. Lewis to Led Zeppelin.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

Northern Ireland's Brobdingnagian stepping stones.

The ship built to ferry passengers and goods to the doomed Titanic is now the last remaining White Star Line vessel.

A museum marks and documents the site of the Titanic's launch.

The highest peak in Northern Ireland is topped with a stone tower and haunting burial mounds.