Pittsburgh’s largest and most detailed model train display began as one WWI veteran’s hobby.

This quarter-mile tunnel under the Bluff in Pittsburgh bends at a 45-degree angle.

Dedicated to a colonial woman who was hanged for being a Quaker.

This headstone marks the grave of an 11-year-old boy killed during clashes in the streets over the boycotting of British goods.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

A century-old landmark that once employed Sinclair Lewis and is still known for its ghost stories.

This unassuimng grain elevator, commonly confused for a smokestack, helped inspire the modern architecture movement.

Originally built by the Works Progress Administration, this park was recently saved from demolition.

A tribute to Charles M. Schulz, who created the iconic cartoon that features Charlie Brown, Snoopy, and more.

A damaged tree turned into a whimsical giant pencil that is sharpened each year.

This landmark honoring a local beer brand is an iconic part of the Minneapolis skyline.

Nicknamed the 'Minnehaha Bunny,' this bronze sculpture is nine feet long and weighs 1,500 pounds.

For posterity, a singular achievement: 3,780 hours of dancing.

The oldest remaining frame residence in Minneapolis.

This small, but beautiful waterfall has attracted visits from artists, composers, and two United States presidents.

This old residential building was once the largest flour mill in the world.

Secret hideaway for an alternative beach experience.

This empty Detroit high school was too expensive to maintain or destroy.

The world’s largest Masonic temple was saved by the White Stripes.

A tiny replica of the iconic London landmark hides on the side of the steel structure.

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

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.