Places lostslav Wants to Go

The world's first time capsule lies behind a welded steel door in Atlanta.

Home to the world's oldest functioning orrery.

An underground city of salt.

These mysterious ancient stone spheres were created by a civilization lost to time and are now mostly lawn ornaments.

A small museum filled with over 1,000 clocks, and one particular clock calibrated to run until the year 9999.

The world's second-largest sundial, made entirely out of stone.

A battle between nature and architecture in the Cambodian jungle.

The enigmatic and seldom visited ruins of a Mayan city-state.

Every equinox this Maya pyramid puts on a spooky ancient light show.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

A walk through the historic city center, under the streets of Seattle.

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.

This notorious Canadian mental institution was home to some of the first LSD experiments and origin of the word "psychedelic."

One man's artistic vision is a small town government's legal battle.

One-layer pyramid in Indiana.

A nearly unconquerable island-fort in the Indian Ocean.

The ancient tomb acts as a calendar that keeps perfect time.

The remnants of an early American attempt at missile defense.

Abandoned city hidden from the world by tropical forest and isolation on the coast of Kenya.

The shattered remains of the world's once tallest structure.

This hunter-gatherer architecture is believed to be the oldest religious complex known.

Keshwa chaca, among the last handwoven Incan bridges, crosses Apurimac Canyon in Peru.

A Belgian self-built tower inspired by the Bible and ancient civilizations.

Ruins of a once-opulent grand Victorian resort.