If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

At one of the nation’s longest-running professional theaters, the audience used to barter for tickets with produce and livestock.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

The "beautiful" equation predicting the movement of all electromagnetic particles is engraved in front of Newton's tomb.

An enormous goose sits atop this nest-shaped home.

This grave marks the final resting place of a legendary frontiersman... unless it doesn't.

This modern castle sat empty for decades before a fire inspired its builders to complete its luxury halls.

Kentucky, Tennessee, and Virginia meet at this point in the Cumberland Gap.

The first KFC is on the National Register of Historic Places.

There aren't too many operational funiculars around, but Pittsburgh has two!

Nothing says indulgence like a 1,500-pound chocolate castle.

A particularly creepy abandoned hospital that sparks interest for lovers of the supernatural.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

An indoor miniature village and labor of love for Laurence Geiringer, a model railroad enthusiast.

This extraordinary Depression-era expenditure was modeled after a postcard of a Mediterranean hotel.

While not recognized by Guinness, this chocolate waterfall is likely to be the world's largest.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Four-story concrete hotel never opened to customers.

A museum dedicated to the history and art of staying clean.

The highest point in Washington state is a volcano covered in glaciers.