An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

On the Oregon coast there is a natural hole that seems to be draining the sea.

World's only nuclear reactor operated by liberal arts undergraduates.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

Giant, friendly pelicans in Central London, the most unlikely of places.

This Puget Sound military post has a long, turbulent history as a gateway to the Pacific.

A quiet and contemplative oasis in the middle of New York's bustle and riot.

A ghost town that held steady longer than most, but finally gave up the ghost.

Settled by the Church of Jesus Christ of Latter-day Saints in 1859, this abandoned frontier town has appeared in several films.

Dig for your own trilobites in this goldmine of invertebrates.

This geothermal hot spring hides beneath a slowly growing mineral dome.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

More gold than anywhere else, ever.

A brewery warehouse which doubles as a circus bigtop.

This Toronto garden collects stares and tchotchkes in equal measure.

This massive, ancient stone was disassembled and then put back together again.

Lost subway station nestled beneath Toronto's busy commuter line.

One of Canada's most incredible rare book collections holds hundreds of thousands of gorgeous tomes that the general public can touch.

The Incredible Hulk, Yoda, Mulder and Scully, and many many others watch over the mean streets of Toronto.

A 100-year-old purveyor of curiosities, curios, and kitsch featuring mummies, shrunken heads, and a Fiji Mermaid.

A short hike into the mountainside forest reveals a decaying 1890s town.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.