Haunting and beautiful trees, doomed to die.

Where commuters walk through remnants of an ancient Greek necropolis.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

What once sat in the world’s spotlight is today a largely disused ghost complex.

A small peaceful park and waterfall tucked amid the urban grind of Midtown Manhattan.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

This little Greek plateau is home to thousands of rustic, white-sailed windmills.

A striking 12th-century-style castle built on the edge of a cliff.

This 1967 experiment in modular architecture was designed to be a new model for urban living.

Yo, Adrian!

The deepest underground city in Turkey was designed to protect 20,000 people behind massive stone doors.

Ottoman-era houses lovingly preserved.

Roman ruins top white travertine terraces formed by ancient hot springs.

A deadly ancient portal to the underworld.

Mausoleum and Holy Seat of Antiochus I of Commagene.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

Masterful ceramic fountain and map of the Pacific Basin.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

Beneath a Virginia City bar is the entrance to an abandoned gold mine.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

A popular winter vacation destination for migrating monarch butterflies.

A collection of memorabilia from the Beat era in the back of a San Francisco bookstore.

A painting in the historic Cathedral Basilica depicts Jesus and his disciples dining on a traditional Peruvian menu.