A medieval replica of King Arthur's legendary table, the Round Table hanging in Winchester Castle was decorated by Henry VIII.

This gravestone and its inscription inspired a movement that has spanned generations and saved countless lives.

The widest waterfall in Europe is a natural wonder and one of the only places where fish are caught in the air.

Just another terrifying garden filled with hundreds of endlessly smiling doll people.

Surreal works of unreal stone and metal dot the landscape of this Latvian art park.

This observatory comes complete with three separate telescopes and a dedicated community of amateur and expert astronomers.

One lonely, modern pyramid has gone from corporate think tank to deserted boondoggle.

Tour the world's largest deep-hole dimension granite quarry, where you can view the plant where gravestones are made and roll a ball down the outdoor granite bowling alley.

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

An abandoned stretch of highway, deteriorating next to the operational one.

This dramatic rail curve was once the target of a failed Nazi attack.

Pittsburgh's literal underground railroad.

The largest clock face in the United States is twice the size of Big Ben and infinitely more ad-sponsored.

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.

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

This picturesque stream was up until recently the site of a ten story mountain of slag and sewage.

Weighing 30,000 pounds, this monument represents Detroit's first industrial era.

The 80-foot tire that looms over Michigan's I-94 was once a Ferris wheel in the New York World Fair.

In Grand Rapids, Michigan, a marker honors the creation story of a proud fictional culture.

An angular maze of concrete in Grand Rapids acts both as public art and as a staircase for fish traveling upstream.

On the right bank of the Grand River a plaque remembers an imaginary painter who once awaited his youth.

A 56-foot tall statue of the god of fire looks out over Birmingham, Alabama.

Once one of the largest producers of pig iron in the world.

A giant white horse drawn on an English hillside may not have been intended to be a horse at all.