A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

This road in the Great Smoky Mountains was supposed to assuage a displaced community, but ended up a $52 million dead end.

The longest navigable underground river in the United States is home to countless blind and albino animals.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

The name of this famed hospital was once a byword for the horrors of medical and psychiatric care.

The second oldest continuously operating bar in Louisiana.

Breathtakingly blue walls shimmer inside the "Glacier Behind the Town."

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

See massive fossils that are over 200 million years old in northeastern Arizona.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

The fountain marks the area where hundreds of accused witches were burned at the stake.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

Northern Ireland's Brobdingnagian stepping stones.

The magic's in the hole!

This fantastical waterfall is hidden in a cave located in a cracked cliff.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

This symbolic piece of New Orleans architecture is also home to a few ghastly stories.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

Strange red rock formations that have been attributed to a higher power for hundreds of years.