An abandoned railroad tunnel is now filled with bioluminescent bugs.

Twice a day a speeding train passes only inches from the homes of this residential neighborhood.

This meticulously extracted nervous system allegedly came from a 19th-century custodian who donated her body to science.

A lonely beacon, precariously perched atop a remote sliver of rock.

It's hard to believe the dizzying patterns covering this abandoned mine are completely natural.

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

Climb atop one of the world's longest and heaviest trains for an unbelievable journey across the Sahara Desert.

This is what trains will look like after the zombie apocalypse.

The ornate miniature mansions were built for Istanbul's feathered residents.

This rare example of a "tidefall" is a spectacular drop from the cliffs down onto the beach.

Nestled in the heart of Milan is a real wunderkammer of morbid curiosities.

Crop circles inspired this whimsical garden in Germany.

This stunning 15th-century royal hill fort preserves the age of chivalry in Rajasthan.

This ancient goddess temple inspired the design of India’s Parliament House.

A magnificent mansion hides a delightful collection of historic timepieces.

This is probably not the Target you're looking for.

This bright yellow bridge is a true engineering feat.

This magical space partly designed by Antoni Gaudi is one of the best examples of romantic gardening in the Mediterranean.

One man's dream has turned into this naturally growing chapel made of almost nothing but trees.

A steampunk airship "floats" above Hamilton Gardens delivering plants and compost.

A new kind of theme park for adults off the Las Vegas Strip.

This curious building hides eclectic details like medieval gargoyles alongside naked angels and Art Nouveau mosaics.

Abandoned medieval hill town.

The one-time watch house for incoming ships at the Golden Gate now stands abandoned and hidden in trees.