Places vaneiribarren Wants to Go

This glass skywalk offers vertiginous views down the volcanic cliffs to the beach below.

A micronation on an islet along the coast of a Portuguese island.

A curious memento mori hangs in the magnificent Cathedral of Segovia.

The vast chamber inside this abandoned cooling tower looks like something out of a sci-fi dystopia.

This Belgian theme park began as a refuge for bored church children and was closed down when a boy lost an arm.

The spectacular and eerie moss-covered grave site of 19th-century Belgian merchant.

This Gothic revival structure has been a family home, a military base, a gymnastics center, and is now owned by one of the largest auction houses in Italy.

The ruins of this magnificent Scottish castle blend both Gothic and Renaissance architectural styles.

The burial place of an obscure North African saint was turned into a macabre body preservation factory for the 17th-century Neapolitan elite.

This recently restored crypt was once plagued by liquefying coffins and exploding caskets.

Head underground and take a tour of the city's working sewer system, and see the underground river Senne, which defined Brussels for centuries before being covered in the 19th century.

A road that winds through this natural cave is the only way to access the small, appropriately-named village of Cuevas.

A stone structure built thousands of years ago on the Iberian peninsula.

The ruins of the second-largest circus school in the world.

This ancient tunnel is one of the most important examples of Roman hydraulic engineering in Spain.

"Satisfying" is a good way to describe these beautifully aligned rows of Spanish mills.

This underwater graveyard commemorates a group of murdered 16th-century missionaries.

Mysterious Spanish catacombs of unknown origins.

A cemetery in Barcelona's Poblenou district is home to this touching funerary statue, which depicts death in the form of a winged skeleton.

Barcelona's historic 19th-century sewers, whose foundations were laid in medieval times, are open to the public for exploring.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

Architectureal fantasy quarter of Rome.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

A collection of oddities including Dr. Kevorkian's suicide device, the Thanatron.