At night, bats patrol this magnificent 18th-century space in search of book-eating pests.

Portugal's National Pantheon has a history of curses, collapses and financial problems.

Iron Age runes and ruins hide in plain sight along this Portuguese beach.

In Portugal, a secluded stretch of untouched natural beauty hides at the bottom of a steep hill.

A windswept necropolis carved into the rocks overlooks the "most Portuguese town in Portugal."

Ring the bell to enter a bar that looks equal parts museum and old curiosity shop.

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

Introducing the Green Fairy to her fawning masses.

This colorful New Orleans bookstore features rare and used titles, with a specialty in Cajun fare.

Site of a former hidden treehouse in New Orleans.

Parts of the civil rights movement unfolded in this historic eatery, helmed by the "Queen of Creole Cuisine."

World's largest precision optical instrument used to detect Einstein's elusive gravity waves.

A mysterious find dredged from Louisiana waters.

Roadside attraction with more than 1,000 stuffed and mounted animal skins displayed in simulated natural habitats with hand-painted backdrops.

This unique shop is full of memento mori art, antique medical equipment, secret society paraphernalia, and historical relics.

An otherworldly musical haven in The Big Easy.

An abandoned warehouse turned art sanctuary in New Orleans.

A swamp and garden tour featuring local wildlife and exotic botanical specimens from around the world.

Legend says a primate-like cryptid prowls this otherworldy sliver of the Louisiana bayou.

A hurricane-stricken oak tree has been reborn as a beautiful chainsaw artwork.

The stone labyrinth in this New Orleans city park was laid to symbolize healing in the wake of Hurricane Katrina.

If New Orleans is the birthplace of the "cocktail," why does their own museum of cocktail memorabilia beg to differ?

Made of giant chains and hung with shackles, this iron cross honors those unknowns who perished under American slavery.

The crumbling remains of a 19th century fortess.