These markers are used to document elevation changes around the famed dam.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

This ancient Egyptian obelisk still bears the wounds of World War I.

A museum wholly devoted to juvenescence.

The sculpture of the deceased cockatoo flops atop its personal plinth.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

This multisensory alley has the ability to remind bustling citygoers to stop and smell the roses.

This enormous fish commemorates the unplanned release of brown trout into a Michigan river.

The structure has welcomed visitors to this scenic harbor city on Lake Michigan for many decades.

An unlikely beach paradise of giant sand dunes lies between two lakes just a few minutes from Michigan's cherry country.

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

This abandoned NASA launch site is now a memorial to a trio of astronauts who were killed there.

A building so large that it has its own weather.

The longest structure of its kind ever built in Michigan.

A memorial to the Potawatomi chief who allegedly ran nearly 150 miles to alert settlers of an impending attack.

The capital of the Cayman Islands is a center of offshore banking, but gets battered by blistering hurricanes.

A massive maritime collision may have led to the myth of a resort island's strange financial status.

Send a postcard while vacationing with Satan.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

A muscular Art Deco monument represents the struggle between regulators and unbridled markets.

Washington's iconic carousel has a nice piece of Civil Rights history.

This unique museum cafeteria showcases the history and regional diversity of African American cuisine.

There’s a hidden military meme engraved on the World War II Memorial.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.