A dozen U.S. presidents have stayed at the historic resort, which was known as James Buchanan’s “Summer White House” from 1857-1861.

The last funhouse of its kind, where guests enter through the mouth of an 80-year-old blue whale.

A portion of the old Pirates stadium over which a defining home run once flew still stands even after the rest of the stadium was torn down.

Collection of trolley cars in the woods represent one man's attempt to preserve transportation history.

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

This cubist Vienna church building looks like some sort of alien stonehenge.

The beautiful baroque library of the Hapsburg empire.

This historic Rhode Island mini-cemetery features a number of headstones run through with mysterious holes.

A preserved relic of the 1904 St. Louis World's Fair and a center of Swedish American Culture.

This rural roadside cross marks the farthest point of Coronado's expedition, and the place where the Catholic faith first came to America.

This historical marker is all that remains of Octagon City, Kansas, a failed vegetarian utopia.

Explore the cabin where the famed abolitionist once lived and the site where he fought the Battle of Osawatomie.

A monument celebrating the Black soldiers of the 9th and 10th Cavalry.

This mid-19th-century dugout was once home to a Swedish family as they erected their homestead.

A unique gallery chronicles the losers of American presidential history.

A cannon designed to fire an atomic warhead.

A house turned museum is the real-life "home" of the fictional main character of The Wizard of Oz.

An unexpected alley with light shows and nature views.

Ever wanted to can Spam?

The famed architect designed this Minnesota gas station of the future with a lookout tower.

This large midwestern cavern features impressive rock formations and an underground waterfall.

This roadside stop between Goblin Valley and the Henry Mountains is the perfect location to view some of the region's natural wonders.

One of the largest private collections of fossils in the world.

Seth Bullock, the sheriff of Deadwood, built this town immediately after Teddy Roosevelt’s death in 1919.