The floating gallery illuminates the heart of Québec City's arts district.

A cooled lava flow from the Haleakalā volcano formed these surreal-looking columnar basalt structures.

The oldest standing structure in downtown San Diego.

A mysterious spirit totem at the edge of Navajo lands.

An ancient octagonal weather station named for the eight Greek gods of wind.

This emotive sculpture was originally created for the 1878 World's Fair.

“It's the quality” (but probably also the drive-through donut tunnel) that has attracted diners since 1968.

It's believed this golden brick is part of the legendary lost Aztec treasure.

Climbing this abandoned railway leads to breathtaking vistas of O‘ahu.

A hat for every occasion can be found in this British Columbia haunt.

The largest and best-preserved Roman amphitheater in Africa was designed to seat 35,000 people.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

This strange statue depicts a young boy's body with an adult Mozart's head and a single wing.

Deep in the Guatemalan jungle stands an ancient pyramid that once marked the reign of a king.

The video game-themed street art first popped up in the French city.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

These roaring primates were considered a divine creature in the cosmology of the Maya.

An incredible mosaic-lined monument said to have held the remains of an ancient Roman empress.

This legendary urban waterfall creates a dazzling display of rainbows.

Psychoanalyst Carl Jung reported a paranormal experience after visiting this mosaic-lined Roman baptistry.

Madrid's last horchata kiosk is a blue-and-white beacon of refreshment.

A medieval, mosaic-lined baptistry built by a heretical Christian sect.

The striking jade death mask of an ancient Maya king is displayed in a replica tomb in Mexico City.

This strange sculpture of a menacing skull surrounded by sun rays was discovered at the foot of the Pyramid of the Sun.