A psychedelic labyrinth on the San Francisco bay.

A huge musical instrument played by the ocean.

Built by a king and rebuilt by an emperor, this aqueduct transported water for 1,200 years to this ancient Mediterranean hub.

This dome-shaped mountain boasts amazing views and has a rich religious history.

The only quarter of the Old City not dedicated to a major world religion.

The maze-like transportation hub contains abandoned areas, derelict stores, and a resident bat colony.

An ancient underground cultic temple where sunlight penetrates on the summer solstice.

This subterranean funicular is one of the world's smallest subways.

This nightmarish children's plaything was left grotesque to help kids conquer their fear.

A "miracle" that seems to produce more holy fistfights than holy revelations.

Sitting right on the border between East and West Jerusalem this modern art museum is in itself a symbol of Israel's hoped-for unity.

Descend 2,030 years into the past in an ancient tunnel built to support Jerusalem's most famous wall.

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

The home of the Dead Sea Scrolls is an abstract modernist dream.

The bluer than blue waters in these natural Israeli caves are reached via the world's steepest cable car.

This giant mural of Santa Muerte in downtown São Paulo reminds passersby of their own mortality.

This singular art museum in São Paulo is unique inside and out.

The bookstore with bookshelves built into unlikely places.