A series of increasingly larger sundials have grown with this school.

Manatees congregate around a power plant's discharge canal where the water is especially warm.

Where monkeys run wild and the humans are caged.

A safe place for the wild donkeys of a hot vacation destination.

A memorial in the Tiergarten is a reminder of the suffering inflicted on homosexuals by the Nazi regime.

One of the world's heaviest musical instruments towers within a popular urban park.

A monument to the man who almost killed Hitler.

Berlin's oldest surviving academic architecture hosted decades of animal dissections.

These former Nazi anti-aircraft towers offer a singular view of the north of Berlin in the summer, and a sanctuary for bats in winter.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

Elevated freight railway turned wildly successful urban park.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

The site of the first medieval crusade that pitted Christians against Christians.

Small French town or alien garage?

A medieval church with largest and oldest collection of Renaissance frescoes in France.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Legend says this sacred tree was a gift from goddess Athena.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

The storefront of a ramshackle Parisian puppet theater.

This Parisian gem is one of the most incredible ethnographic museums in the world.