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

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

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

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

Real bones which are said to have belonged to a Polish dragon.

This Polish cave has housed a dragon, a brothel, and an enduring legend.

The site of the first battle of World War II.

An underground city of salt.

Beneath Kraków Old Town's main square lies a hologram-filled medieval market vampire graveyard wonderland.

This iconic clock tower is the largest in the Philippines.

A church made of steel.

This curious fresh and salt water lake holds a secret that draws in deep divers from around the world.

Preserved Inca city and site of the last Inca stronghold against the Spanish conquistadors.

The mortal remains of an estimated 70,000 people lie in the basement of a monastery in Lima, Peru.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

A pocket of jungle amidst urban expansion in Panama.

A solar-powered primary school inspires hope and experimentation in a country ripe for energy innovation.

This fortress dates back to the 6th century and is also the site of a controversial abandoned restoration project.

Depending on the region's rainfall, this church may be partially submerged.

Dolphins, ancient clams and hundreds of waterfalls make this one of the world's top tourist destinations.

Tubing through a cave lit with glowworms is a magical underground experience.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

This historic square in Nepal is home to temples dating back to the third century.

Sacred Buddhist home of some spiritual monkeys.