An impromptu shrine appeared shortly after beloved "Torchwood" character Ianto Jones was killed off the show.

The fierce beast perches atop a pedestal marking where the historic City of London gates once stood.

An unusual round church in London with a Templar past.

At Chicago's revered Field Museum, visitors are invited to learn about and literally explore DNA.

These pretty kitties killed and ate as many as 135 railway workers.

Honoring the star of the “The Bob Newhart Show” which took place in the city of Chicago in the 1970s.

This alley in downtown Chicago held the bodies of over 600 people after the fateful Iroquois Theatre fire.

A gothic church spire sits atop this skyscraper, the tallest church in the world.

A journey begins with a single step, and for many, the road-trip of a lifetime started at this Chicago intersection.

A spectacular remnant of an Adler and Sullivan masterpiece that was destroyed in 1972.

Fragments of architectural wonders from around the globe are embedded in the newspaper building's walls.

Once at the center of U.S. finance, the historic Trading Room was meticulously recreated piece by piece and rebuilt in the Art Institute.

This historic hotel invented the chocolate brownie.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

First planned industrial community in the United States.

Once designed as the entrance to Buckingham Palace, this structure was later relocated and stands as a victory arch.

Originally meant to hold a statue of King William IV, this support sat empty for years. Today, it hosts a rotating cast of public artwork.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Mary Kelly was last seen here before she was murdered by Jack the Ripper.

A special shop catering to the needs of things that go bump in the night, and also helps kids become writers.

The remains of the medieval wall that once surrounded Paris with ties to the construction of the Louvre.

A tribute shrine where the Space Invasion street art movement started.

If you look closely at the oldest bridge in Paris, you might notice hundreds of ugly faces leering from its sides.

This innocuous-seeming building is actually the remnant of a major wartime brothel.