Places Kristance Harlow Wants to Go

If you can look past the nearby sewer pipes, this urban sinkhole grotto is a mini-paradise.

An ancient system of freshwater caves filled with animal bones, including that of species long-extinct.

A flooded Mexican cave that hides a river beneath the water.

A 500-year-old series of tunnels long believed to be folkloric was uncovered beneath the streets of Puebla.

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

Part bookstore, part café, and part forest.

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

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

A seemingly endless landscape of pure salt stretches far across Bolivia.

Xul Solar was an artist of alternate worlds, inventor of languages, and dreamer of utopias.

Museum housed in underground tunnels that date back to Buenos Aires's earliest settlements.

A beautiful young girl said to have been buried alive in her coffin…

This historic, palatial theater is now one of the world’s most beautiful bookstores.

A gateway to a mysterious network of underground tunnels.

A tower devoted to — and modeled after — the Divine Comedy.