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

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

This abandoned dream castle and its cemetery look out over the city that once inspired their creation.

Beyond the usual stories that attend old prisons, this one has deep bloody undercurrents.

The largest burial mound in the United States holds the remains of prehistoric West Virginians.

A well-preserved relic of the industrial age steel and iron works that dotted West Virginia.

Take a steam-powered ride straight out of the past on this Appalachian rail line.

The world's largest fully steerable radio telescope.

This rural community has attracted both scientists and techno-refugees due to its federally-mandated lack of technology.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

Whitewashed mosque contains the world's largest carpet.

On any given day this sprawling market houses literally tons of government-regulated gold, gems, and precious metals.

The world's largest frame offers spectacular views of the city's past and present.

A preposterously luxurious hotel with gold-plated iPads, Rolls Royce chauffeurs, and a staff that trains by watching "Downton Abbey."

This indoor ski resort has a mountain contained inside a mall.

Billed as the "largest natural flower garden in the world" this Middle Eastern show field has little competition at 45 million flowers.

This enormous sports car themed amusement park is home to the world’s fastest roller coaster.

This university transit system is a 1970's vision of the future.

This claimant to the title of "smallest church in the 48 states" doubles as an equally tiny, quasi-post office.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

Visit a replica of the estate where Aaron Burr allegedly plotted a treasonous scheme against the United States.

One of the few places where you can explore a 1918 paddlewheel steamboat from stem to stern.