An abandoned 6th-century monastery features a medieval map of the known world.

Hidden underground, a remarkable 10th-century bath complex survives virtually unaltered.

This unassuming bookstore in the heart of Madrid is one of the oldest in Spain.

A must for film lovers in Madrid and home to the Spanish Film Library's projection space.

In this 400-year-old hotel in Madrid, you'll find a comb in every room, an old clock, and maybe a ghost.

This 18th-century pond is one of the main attractions in the Jardín del Príncipe in Aranjuez.

Meant to resemble a massive tree, the building is the best example of Spanish organicist architecture in Madrid.

Housed in a stunning Victorian building, this museum has the largest exhibition of knives, blades, penknives, and scissors in Spain.

This humble bench is considered the most beautiful in the world.

Known as the Casa de las Siete Chimeneas, this haunted 16th-century manor has a dark, mysterious past.

Designed by Gustave Eiffel before his famed tower.

These distorting, funhouse mirrors achieved fame in a renowned piece of Spanish theater.

An old quarry transformed into a recreational and cultural space.

The ruins of the second-largest circus school in the world.

One of the best examples of the modernist movement in Madrid.

Nicknamed the "Spirit of Paul Klee," this colorful apartment building features an array of multicolored panels.

For more than half a millennia, this automaton has rung an hourly bell.

A space-grade telescope mirror lies discarded in the shrubs.

The oldest building in Madrid.

From grand battles to daily life, this Spanish museum offers a view of world history in miniature.

This house covered in small stones was the work of one man over the course of nearly 30 years.

This grand gate once marked the entrance to a military barracks.

Built to celebrate the glory of a new queen, this forgotten monument has moved around Madrid three times, reflecting 200 years of political whims and city redevelopment.

The Spanish king's private bathroom embraced the idea of a porcelain throne.