The author of Uncle Tom's Cabin was neighbors with Mark Twain while living in this Connecticut home.

The oldest place in Hartford is a cemetery with thousands of bodies stacked beneath the grass.

An iconic steel and chrome diner from the 1940s left empty for nearly 20 years is in danger of being demolished.

The former home of Samuel Clemens and family remembers the happiest period of the author's life.

A folk art mecca famous among outsider art fans.

The final resting place of a space program monolith, soon to be unveiled again to the public.

The world-record holder for the longest bridge stretching continuously over water.

One of the best-preserved Roman amphitheaters is still used today, but for less brutal events.

This winding road of 318 curves is a must-visit for (careful) motorcycle and sports car enthusiasts.

This giant iron playfully pays tribute to an early 20th-century architectural trend.

Every week, a festive public jam session breaks out in downtown Asheville.

The only known Futuro house in North Carolina sits along a stretch of desolate highway on the Outer Banks.  .

A mailbox that saved a nature reserve.

This high point in the Great Smoky Mountains is said to be home to the chief of all bears.

This metal disk commemorates the birth of a historic American holiday.

This stunning home looks like it belongs in medieval Europe, not North Carolina.

Rare recess caves fill this unbelievably beautiful Ohio park.

This towering statue of Jesus provided internet to the surrounding area.

This underground church is topped with a 500-foot cross that is seen by many as a beacon of fascist hubris.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

Whether they are bulls or pigs, these ancient animal sculptures are fascinating relics.

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.

The world's largest wooden structure.

Who needs fancy modern water slides when this giant North Carolina rock works just as well?