These haunting ruins of a 700-year-old Prehispanic city have witnessed centuries of wars and massacres.

Mexico City's largest market contains a Willy Wonka-esque wonderland.

Every equinox this Maya pyramid puts on a spooky ancient light show.

A disquieting Aztec sculpture displays hundreds of stone skulls representing the victims of human sacrifice.

Explore the atmospheric ruins of an abandoned convent in the dense forests of Mexico's first national park.

66,000 pieces of art, donated by one of the world's richest men.

Superstitious? Discover the witchy side of Mexico through its largest esoteric market.

Frida Kahlo's childhood home, now a museum of her life and works.

Part bookstore, part café, and part forest.

The last king of Poland was interred in this church nearly 200 years after his death.

One of the world's largest amber altarpieces is housed within this reconstructed medieval church.

The giant statue and its model solar system honor the native Pole who declared that the Earth revolves around the Sun.

This 13th century Gothic brick castle is the largest in the world by surface area.

The Polish capital has had a deep connection to its guardian mermaid for almost a millennium now.

A huge wooden clock that is so beautiful its creator was forcibly blinded.

A menacing statue of this mythical creature can be seen at the legendary site of the monster's lair.

Inside this Krakow church, an explosion of psychedelic color.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

This 700-year-old structure is one of the most unique architectural and historic monuments in Gdańsk.

Gustave Eiffel's masterpiece until the Eiffel Tower was built.

The devil-defying mark left by a saint as a boy is visible inside Lisbon's cathedral.

This castle has links to Portugal’s founding and struggles for independence.

This unique architectural wonder is also tied to one of the 20th-century's most renowned writers.

The corpse bride of Portugal.