Underwater art project will double as a massive artificial coral reef to help regenerate the damaged ecosystem.

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

A lovers' beach, tucked below the surface of the island, provides a safe haven for romance.

Extraordinary sculpture garden created by an eccentric English poet.

These azure waters were thought to lead to the Mayan Underworld.

An Aztec snake god has taken the material form of an apartment complex.

This old-school café is famous for serving coffee, chilaquiles, and the Cuban Revolution.

The official Presidential Residence of Los Pinos became an emblem of Mexico's opulence and presidential corruption.

Many people don't realize there’s a lot going on in—and below—the world’s tallest triumphal arch.

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

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

A jaw-dropping "megalibrary" that turns book-browsing into a geometric adventure.

An island filled with hundreds of hanging, decomposing, decapitated dolls.

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

This small museum holds a treasure trove of ceramic figures that are either a hoax or proof of dragons, aliens, and dinosaur riders.

L.A.'s oldest operating bowling alley is a beautifully restored homage to its speakeasy days.

The space-age building is home to one of the few remaining rotating restaurants in America, and the only one that inspired a 1980s sitcom.

A "Titanic" superfan changed his name to Jack and set up this strange shrine to the blockbuster, complete with Korean food and Tarot readings.

World-famous, Pink's still manages to keep its prized cult fetish status.

A secret door leads to this cozy dive that sells only “milk.”

The bizarre headgear looks like it was made for a fool, not a king.

At just 25 inches at its narrowest point, it's one of the tightest streets in the world.

Unusual British home built to disguise a water tower.

Near the former site of numerous witch burnings, this lavish Edinburgh mainstay pays homage to Scotland's brutal history.