The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

St Bernard de Clairvaux Episcopal Church, better known as one of the oldest European buildings in the Western Hemisphere.

A museum celebrating rare American motorcycles where everything runs—and none of it quietly.

The highway's southernmost spot is a beloved local attraction.

A monument celebrating the idea of reaching inaccessible places.

The famous boat that once ferried Bogart and Hepburn still floats in Key Largo after being abandoned for years.

With nickel-steel armor and three-inch thick bullet resistant windows, FDR's train was a rolling fortress.

A mysterious castle built as a monument to lost love.

This Indianapolis landmark offers a secret panoramic view of the city. 

At the top of the hour, this steam-powered clock's eight brass whistles play "Back Home Again in Indiana."

This artificial lake was built to provide water for a planned facility that would treat tuberculosis patients.

A timber wharf that contributed to Echuca becoming the largest inland port in 19th-century Australia.

It's said that visitors can "see" Tasmania inside this cave.

These giant grain silo portraits capture elements of rural life in Australia.

These bronze sculptures sow whimsy by hamming it up on a pedestrian mall.

This historic tall ship traveled 1.5 million miles around the globe, and once did duty as the mythical pirate ship in Peter Pan.

Australia's first open air museum and antique 3D theater.

Taxidermy of the racing horse with a huge heart, who inspired hope in the Depression.

One of the first big sculptures anywhere in Australia.

The 18th-century home was disassembled into 253 cases and brought all the way from the other side of the world.

Once housing children next to hardened criminals this historic jail once displayed Ned Kelly's skull until it was stolen.

Relics of Australia's convict past, and a modern scene of unimaginable horror.

Clusters of huge boulders in the Australian Outback.

Come for the flowers, stay for the bats!