This memorial to the victims of the Romanian Revolution of 1989 is often compared to a potato on a skewer.

Romania's triumphal arch looks out over Bucharest.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

This once-derelict building is now one of the most beautiful bookstores in the world.

One of the newest mosques in a city filled with thousands.

A gorgeous, Gaudí-esque stairway constructed in the city of Istanbul by a prominent Jewish family.

Taking the subway here means doing so over a bridge located in the middle of an estuary.

Ancient serpentine sacrifice holder that has stood the test of time.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

A little-known park with unusual, half-ruined structures and a mystical energy.

This 17th-century passageway is home to numerous bookshops, a witch legend, and the oldest pizzeria in the world.

Every day is like Christmas on this street where the traditional Neapolitan nativity scene comes to life.

San Gennaro, the patron saint of Naples, greets pedestrians between these narrow city streets.

This hydrochronometer was invented by a Dominican monk and is a prime feature in this garden.

A small but very fascinating fountain in the center of Rome with four books and a deer carved.

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

Hidden in plain sight, a gravestone seemingly inscribed from the future stands among the cemetery’s historic tombs.

Prank chair from an 18th-century Danish royal court shows the eternal popularity of fart jokes.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

Lyon's "Wall of the Silk Weavers" is one of the largest murals in Europe.

After decades of damage, this feat of timekeeping and automaton art has been given a new lease on life.

Lyon's miniature version of the Eiffel Tower was built as a statement in support of French secularism.

Lyon, France is home to two remarkably preserved Roman theaters, one dating back to 15 BCE.

This hidden garden boasts amazing views of Lyon.