Visitors can walk over the largest concentration of Columbian mammoths to have died from one event.

An ivy-covered arch bridge dedicated to Tejano music singer and legend Rosita Fernandez.

Texas's oldest bakery serves authentic German pastries, including legendary strudel.

This grand Spanish-Cuban restaurant has been serving customers for more than a century.

The only road through the heart of Glacier National Park.

Statue dedicated to the star of an old television show.

Behind a modern brick exterior lies the oldest continuously-operating lunch-car diner in the United States.

This public baseball field is a beloved remainder from of one of the most historic stadiums in the country.

This sprawling bookstore spans four floors and has more than a million books in stock.

Controversial tribute to the heavyweight champion boxer who grew up in Detroit.

A rugged lava field dotted with molds of the ancient pines that were growing when the volcano erupted.

The world's last remaining store of its kind.

The highest point in Maryland is only accessible by hiking through another state.

A precariously balanced rock perches on the edge of a cliff created tens of thousands of years ago by glacial erosion.

A decidedly out of place statue memorializes the Blues Brothers characters at this water bottling plant.

It would take 35 firetrucks to fill this enormous glacial pothole.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

This little-known collection holds everything from "Dracula" notes, to the manuscript of "Ulysses," to the forged works of Shakespeare.

While many places make the claim, the Library of Congress says this restaurant is the birthplace of the hamburger.

This historic iron-working village is now a ghost town so immaculate that it looks as though it was recently built.

A moody and picturesque riverside ruin overgrown with vegetation.

The modern birthplace of Irish freedom.

A tiny, unmarked beer and whiskey bar above an Ethiopian restaurant in West Philly fails to conceal live bluegrass.