Before it was buried by volcanic ash, this fast-food restaurant fed the hungry hordes of ancient Rome.

A gorgeous example of 13th-century Gothic architecture.

One of the oldest and most significant collections of Ancient Egyptian archeology outside of Egypt.

These elaborate gothic monuments honor Verona's medieval lords.

Inside houses a vast collection of military aircraft and missiles spanning the ages.

Beneath the city of Lourdes, France is a massive, concrete church.

The bears of Bern have been a city highlight for over 500 years.

This simple apartment may have inspired some of the most important theories in the history of science.

Swedish skyscraper with a 90° twist.

This chimerical bridge/tunnel appears to dead end right into the sea.

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

Climb to the top of its spiral spire for spectacular views of Copenhagen.

An imperial church bombed to ruins during WWII now stands as a jagged memorial.

For patriotic Russians, this memorial honoring the Soviet soldiers who died liberating Berlin in 1945 is the most sacred location outside of Russia.

This museum covers 10,000 years of Pre-Columbian Latin American history.

A unique seaside cave where Aleister Crowley faked his own death.

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

A stunning 18th-century site where pilgrims ascend by a series of punishing stairs only to return via funicular.

Located in the thermoelectric factory that once powered the entire city, this Portuguese museum is shockingly fascinating.

This giant sculpture made of trash is a critique of society's wastefulness.

On the shores of Lake Garda, the ruins of a Roman villa that allegedly belonged to the poet Catullus.

One of the most well-preserved castles in Italy also contains a rare medieval example of a port fortification.

This medieval city gate is now a blend of the past and the modern world.

This seaside Italian village doesn't just look Escher-esque, it actually inspired the mind-bending artist.