A whimsical monument marks the highest point in Kansas, not that you could tell by the looks of it.

The highest point in Iowa, while not that impressive to mountain states, has earned its own monuments.

The highest point in Indiana is curated by an Eagle scout but may be in danger of losing its record to a nearby garbage pile.

The king of U.S. high points towers over every other peak on the continent.

The highest point in Arizona is an oddly snow-topped peak within the otherwise arid state.

A fifth-century temple improbably built into the side of a cliff.

This abandoned, turn-of-the-century astronomy hub is now the subject of more photographs than it ever took.

The barrel-made lookout from Shackleton's final ship is tucked away in the crypt of one of London's oldest churches.

A spiral staircase twists to the top of this unusual Czech lookout tower.

This Rhode Island mansion was a stand-in for the exteriors of Collinwood in the original "Dark Shadows" series.

This 3,500 pound obelisk was constructed with more than 1,000 reclaimed guns.

The silent film master's legacy commemorated in all the right and wrong places.

This amazing example of Valencian Art Nouveau looks more like a cathedral than a public market.

The origin of the Nixon tapes is rooted in technological incompetence as much as secrecy.

Parking garage where Bob Woodward met Watergate source "Deep Throat."

An ancient burial ground believed to have been used for ritual sacrifice.

This amazingly well-preserved villa just outside Pompeii boasts rare examples of ancient Roman paintings.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.