Life-sized sculpture of a blue whale made of hand-recycled plastic trash.

Giant origami sculptures tucked into desert scenery beckon passers-by to explore further.

These Pre-Columbian petroglyphs contain representations of birds, deer, hunters, and even some early Native flute players.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

The woman who helped save 15th-century France was born in this humble home.

This iconic 1958 tower welcomes air travelers to Tucson with neon-lit letters and architectural style.

Visitors to this public park will also find the ruins of an old western fort.

Little-known artist couple chose a former silk factory as the location for a museum dedicated to their work and other avant-garde art.

This Gallo-Roman sanctuary is dedicated to Serápis, god of the underworld.

This tile-work piece featuring a chicken riding in carriage is both a remarkable artistic creation and a social commentary of politics and culture in 17th-century Portugal.

A chunk of the "true cross" is held in this small Portuguese church where modern day exorcisms are said to be common place.

This giant sculpture made of trash is a critique of society's wastefulness.

Building owners can take out tiles for free at this repository for historic building materials.

"Portugal's Stonehenge" is made up of nut-like stones aligned with the heavens.

When Azorean green tea meets volcanic hot springs water, a luminous brew is born.

An early Portuguese serial killer's head is alarmingly well preserved in a jar at the University of Lisbon.

The verdant mossy ruins of a Franciscan monastery lie in the remote Sintra hills awaiting exploration.

This charming candle shop has been in business since 1789.

The stunning interior of this Gothic church is covered in ornate gold details.

The world's oldest bookshop still in operation.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

San Francisco Bay's ghost town.