San Francisco's newly reopened hands-on science museum.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

It's beautiful, it's haunted and its claim to fame is that it's the oldest existing stone arch bridge in Australia.

A winding path built in secret on the edge of the continent.

A huge musical instrument played by the ocean.

A tiny nondenominational church harkens back to the days of the first homesteaders in the region.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

See massive fossils that are over 200 million years old in northeastern Arizona.

Inside this store, a mysterious statue draws visitors from the world over.

This volcano rises like a giant anthill from the plains below, with a road spiraling up to the rim.

A house turned museum is the real-life "home" of the fictional main character of The Wizard of Oz.

An experimental, automotive replica of Stonehenge.

The bizarre visions of H.R. Giger, tucked away in a Swiss medieval city.

A short distance from the Eiffel Tower is the final resting place of several of the city’s more well-known and interesting characters.

One of the Eight Wonders of Kansas and the first official National Natural Monument these stark formations look like nature's Stonehenge.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

These banned cigarette vending machines now sell little pieces of pocket-sized art.

Elevated freight railway turned wildly successful urban park.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

A beautiful but toxic fountain of mercury.

A working steam clock, one of only a few in the world, located in Vancouver's Victorian Gastown.

A Wild West jailhouse that slid down the mountainside.

Concrete strongholds stand guard over the Golden Gate.