Bubbling up from deep underground is the warm crystal clear water that fills the Warm Springs Pools, America's oldest spa.

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

These tourist trap caverns are said to be the former home of a legendary Pennsylvania Hermit.

Home of the only civilian casualty at the Battle of Gettysburg.

While seemingly a cruel joke, this bench actually honors an esteemed member of the community who passed away in 2006.

Among the may artifacts on display is a clock made of 50,000 individual pieces of wood.

Don't get it twisted: This is the oldest pretzel bakery in the United States.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

Berkeley Springs State Park boasts the nation's only monument commemorating presidential bathing.

The oldest active church in Pennsylvania is also the second oldest Swedish Church in the United States.

Yo, Adrian!

Huge masonic hall in Philadelphia with lavishly themed rooms.

This little-known collection holds everything from "Dracula" notes, to the manuscript of "Ulysses," to the forged works of Shakespeare.

This elaborate towering structure was once famed for its revolutionary height.

This beloved marketplace mascot poops money and grants good luck.

Find your state fair food favorites all year long.

The legendary cliffside castle of three-time Voivode of Wallachia, Vlad the Impaler.

This once-derelict building is now one of the most beautiful bookstores in the world.

A contemporary art installation housed within a Gothic cathedral.

Perched above a grotto, this tribute to Mother Nature looks out into the ocean.

Thousands of well-dressed mummies below a monastery.

This triumphal 16th-century arched gateway leads to the oldest street in Palermo.

A study of Fascist era Art Deco design in Italy.

Why a column on the entrance is inscribed with a verse from the Quran is one of Sicily's many mysteries.