The official motto of Luxembourg reminds passersby of the Luxembourgish commitment to their national identity and sovereignty.

The last bastion of Roman presence north of the Alps looms over a German town.

The birthplace of Karl Marx is now a museum dedicated to the communist revolutionary's life and work.

This tremendous timepiece was once the largest cuckoo clock in the world.

A historic casino where Dostoyevsky is said to have lost it all on a single spin of the roulette wheel.

From Nazi chemicals to the CIA, this architectural marvel has played a fascinating role in German history.

This kilometer-long university building is an unexpected architectural delight.

During segregation, this Orlando hotel hosted performers like Ella Fitzgerald and Louis Armstrong. Now it's a museum dedicated to preserving local Black history.

Loyal fans of one television's most famous painters still come to pay their respects.

Opened in 1976, this monster-sized version of the fast-food franchise is sometimes called the Epic McD.

A mega theme park-wax museum mélange containing all things biblical.

The most unusual block in Brasília.

The yawning maw of this pagan visage is said to bite off the hands of liars.

This former Roman Catholic Church still contains the embalmed hearts and organs of 22 popes.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

The remains of this 2nd-century Roman temple are incorporated into a modern building.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

This small, ancient Roman temple was once a church dedicated to the patron saint of penitents.

This curious, round temple is the oldest still-standing marble building in Rome.

The best preserved Paleochristian basilica in Rome hides a number of oddities and secrets.

The "Great Sewer" of ancient Rome is one of the oldest sewer systems in the world, and is still in use.

Installed in an act of one-upsmanship, the annual sundial in this church is also a symbolic victory for the Gregorian calendar.

This one-of-a-kind Roman arch is not actually dedicated to the god Janus.

Believed to be the remains of the lost Temple of Minerva, this nymphaeum has been known by its misnomer to this day.