Incorporating the mansion once owned by steel magnate JP Morgan, this sumptuous cultural center houses a phenomenal array of manuscripts, tapestries and books (with no fewer than three Gutenberg Bibles). Adorned with Italian and Dutch Renaissance artworks, Morgan's personal study is only trumped by his personal library (East Room), an extraordinary, vaulted space with three stories of walnut bookcases, a 16th-century Dutch tapestry and zodiac-themed ceiling. The center's rotating exhibitions are often superb, as are its regular cultural events. Audioguides are free.