Once an ancient sea, this landscape of rocky ravines is filled with the fossils of ancient marine life.

The world’s largest combined collection of U.S. and Russian aircraft got its start in a poultry building.

Celebrating the cultural heritage of Kansas’s premier cowtown.

A wonderful collection of all things Oz is nestled in the heart of Kansas.

Two hundred tons of pioneer artifacts were painstakingly recovered from a shipwreck at the bottom of the Missouri River.

One of Mexico's least-visited archaeological sites is tucked away inside a theme park.

A memorial to the nearly 10,000 American soldiers laid to rest on the beaches of Normandy during WWII.

A former Army airfield is home to one of the largest aviation museums in America.

Home to Hollywood history and a very special salt crystal.

This bridge over D.C.'s Rock Creek Park is sometimes called the "Buffalo Bridge" because of its four buffalo sculptures, which were cast from a single piece of bronze.

A small park honors the legendary Ukrainian poet.

This giant, granite purse is one of Melbourne's most unique and distinctive pieces of public art.

The city’s oldest gateway to the galaxy lies at the entrance to the Royal Botanical Gardens.

Home to the oldest operating roller coaster in the Southern Hemisphere.

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

The giant birds honor two native North American species.

One of the largest underground systems runs under Canada's largest urban center.

The only Leonardo Da Vinci painting in the Western Hemisphere.

The only female equestrian statue in Washington, D.C. is a 15th-century French heroine.

One of the three perfect vellum copies of this historic book known to exist is on display in a specially-designed case.

This groundbreaking 16th-century map is known as "America's birth certificate."

Ancient serpentine sacrifice holder that has stood the test of time.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

A fountain standing as a testament to a doomed alliance.