The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

A tribute to the hard-working men and women of Grumman, who crafted F-14 fighter jets.

This 19th-century Hamptons windmill was once home to modernist painter Agnes Pelton.

What began as an art installation is now the private drinkhaüs for a brewery's employees.

Home of the "true" equator.

Quito's historic, main square dates back to the 16th century.

These mammoth-yet-narrow crevasses in the Earth are perfect for taking an otherworldly swim.

An exhibition devoted to the life (and posthumous taxidermy form) of the last known representative of the Pinta Island Tortoises.

Hell on Earth is actually a small town in Michigan where anyone can be mayor for a day.

A chilling disappearance (and rescue) of a child uncovers a geological mystery.

A well-preserved example of an early industrial operation in the northeastern United States.

A tiny one-room church built after one man's prayer for healing was answered.

Home of the only civilian casualty at the Battle of Gettysburg.

A pyramid commemorates the birthplace of James Buchanan, the 15th president of the United States

Memorializing an American tragedy of massive proportions.

Dozens upon dozens of boulders engraved with scripture tell the story of one man's troubled life.

This extraordinary Depression-era expenditure was modeled after a postcard of a Mediterranean hotel.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

This collection honors the iconic, and proudly American lighter that just won't quit.

A tradition unlike any other, this marks the site of the annual Groundhog's Day tradition.

A local prank turned town icon.

When the Austin Dam failed it destroyed much of Austin...and then it failed again.

There aren't too many operational funiculars around, but Pittsburgh has two!

In the bowels of a 19th-century brewery lurks a fine-dining restaurant offering an array of themed feasts.