More than 350 million years ago, western New York was covered in a vast sea. Today, you can dig up the remains of the plants and animals that lived there.

Wall to wall taxidermy at Denver's oldest and most exotic steakhouse.

A Rocky Mountain city provides a happy ending for a pinto pony and his Brobdingnagian red chair.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

A focal point of in Denver’s skyline for over a century, inspired by a Venetian basilica.

Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.

This clifftop arch is a natural stunner.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

Millions of numbers carved in glass represent the tattoos forced upon victims.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

The last remnants of Fort Pitt also hold the distinction of being the oldest structure west of the Allegheny Mountains.

This urban drawbridge gained eternal pop culture fame when the Blues Brothers jumped it while it was raised.

This medieval city gate is now a blend of the past and the modern world.

Before it was buried by volcanic ash, this fast-food restaurant fed the hungry hordes of ancient Rome.

A slightly creepy gallery of plaster cast models in the same museum as Michelangelo's David.

Erotic art covers the walls of the largest ancient pleasure palace.

Ancient snack bar of the Roman Empire re-opened.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

A popular legend claims that the famous pizza was invented at a restaurant in this alley.

A restaurant devoted to "trouser grip" wrestling, an ancient form of Viking wrestling that is Iceland's national sport.

Long before ultrasounds and modern testing, medical specimens like these conjoined twins helped physicians learn about congenital anomalies.

“Invented in Key West, Perfected in Brooklyn."

The compass on its front was a handy tool for 17th-century merchants who needed to know the direction of the wind.