This narrow coastline trail through the dense Kauai wilderness is among the most beautiful and dangerous in the world.

This industrial area was the dumping ground for massive amounts of trash, some of which washes up as tiny bits of sea glass.

Neither Spanish settlers nor anyone since has been able to tell who built these strange California rock walls.

The restored and active Victorian-era final resting place of San Francisco.

Visible below the waves are memorials to the city's Gold Rush dead.

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

Olfactory delights in San Francisco's Botanical Gardens.

A huge musical instrument played by the ocean.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

Rodin's famous depiction of Dante's 'Inferno', amidst a sculpture garden of many of his other works.

The Internet Age began with a transmission from this biker bar.

This odd California folly seems like it was almost designed to accumulate urban legends.

This gem is often wrongly overshadowed by the larger, newer Metropolis church in Athens.

Hideout of thieves, monks, and goat-footed gods.

The hallucinogenic center of the ancient world.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

An ancient octagonal weather station named for the eight Greek gods of wind.

Legend says this sacred tree was a gift from goddess Athena.

This mystical orb covered in strange symbols is thought to have been used in ancient Greek magical rituals.

Two thousand artifacts from around the world collected by one woman who loved to travel.

Like stepping into a spooky fairy-tale, this shop carries the dark ideas of artists and other makers.

A careful eye can find hundreds of dinosaur tracks running along the Connecticut River.

The headquarters in Salem doubles as an occult art gallery.

The ruins of this ancient fortification wall sit in the middle of a quiet, residential intersection.