Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

This old-fashioned carhop restaurant gave the world the waffle cone.

A once-groundbreaking power plant turned into a hotel and mini-museum of archeological and geological wonders.

This Florida sinkhole hides a rainforest-like micro-environment in its depths.

Ruins of a Carnegie family mansion on Cumberland Island.

This natural wonderland is a unique chance to explore a Carolina bay, a mysterious geological formation of unknown origin.

One of Australia's largest secondhand bookstores.

I-95's Tijuana-style celebration of kitsch at the Carolina border.

The first museum in the U.S. to address human rights issues in China.

The bones of this aquatic dinosaur turned to opal over the centuries and the beast's remains were almost sold as jewelry.

Come for the flowers, stay for the bats!

Popular tourist destination now stands as a memorial to Sam the koala.

Commemorating the 19th-century labor movement in Australia.

This ancient rock shelter features cave art and is one of the most culturally important sites in the country.

The largest collection of Indigenous Australian artifacts in the world, and the rare museum where wood-and-glass cabinets have trumped interactive exhibits.

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

An incredible garden taking over the interior of a massive sinkhole.

A massive metal lobster welcomes tourists to a roadside restaurant.

An animatronic tribute to a legendary half-man, half-fish creature.

A clear example of the process of erosion in action.

This 20-story artwork on a public housing block is the tallest mural in the Southern Hemisphere and tells the story of a community.

A historic model village was gifted from residents of London to Melbourne as thanks for their help during World War II.

A whimsical menagerie of creatures carved into a 300-year-old tree trunk.

Featuring Torres Strait Islander cuisine and Australia's first indigenous bar.