Peru

A rotating circle of plants in Argentina, a boiling river 400 miles from any volcano, and the founders who got voted off the board.

From a $225 Rio-to-Lima marathon to a $24,000 guided expedition, the world's longest bus rides are a study in slow-travel misery.

One pole is a militarized chessboard, the other a treaty-bound science preserve. Same frozen water — completely opposite outcomes.

The Aqua Virgo still pours into the Trevi Fountain. The Cloaca Maxima still drains central Rome. What keeps ancient infrastructure alive?

Roughly 250 of the world's 7,000 languages have 100,000+ speakers. What's it like living in one of them?