One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

The Incredible Hulk, Yoda, Mulder and Scully, and many many others watch over the mean streets of Toronto.

This Hindu temple is an architectural marvel designed and built according to ancient Indian principles.

Smallest house in Toronto sits on a lot meant to be just wide enough for cars to drive through.

This Toronto garden collects stares and tchotchkes in equal measure.

The Victorian-era greenhouse is stuffed with tropical plants, and open 365 days a year.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

A botanically themed auditorium blooms within the world’s last operating double-decker theater.

The Italian revolutionary's legendary wife is portrayed on horseback waving a gun and holding her child in this memorial on the Janiculum.

This small church was constructed over the ruins of three temples dating to the Roman Republic.

An ancient Roman temple first dedicated to an emperor's wife is now a church.

A monumental fountain in Rome features a large statue of Moses that has been criticized for centuries.

Known for centuries as the famous Roman emperor's burial place, this monument is actually something else.

A massive marble foot is tucked away in a small alley near the Pantheon.

In Rome’s Jewish ghetto, a 200-year-old bakery still makes the neighborhood’s historic sweets.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

This ancient market is often referred to as the oldest shopping mall in the world.

Ancient ruins hidden underneath a modern luxury hotel.

Brass cobblestones mark the places where individual Holocaust victims were taken from their homes.

A treasure trove of Renaissance-era funerary art in a Roman church built on top of Nero's grave.

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

Museum dedicated to literary greats of the Romantic Period is also the home in which Keats met his untimely end.

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.