The Westin Palace, Madrid $$$$
Concierge.com's insider take:
First opened in 1912, the Palace was built to impress, and the huge stained-glass rotunda on the ground floor remains a meeting place for Madrid's power players. Suites retain a traditional European feel with marble bathrooms and mahogany wardrobes, but they have been modernized to include soundproof windows, air-conditioning units (a must for Madrid's searing summers), and high-speed Internet. Art lovers will find this the perfect base, with the Thyssen-Bornemisza Museum and the Prado across the street and the Reina Sofía nearby. Ask for a room at the front facing the Neptuno fountainthe higher the better, as the top floors have great views of Madrid's ornate central post office.